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120704131 = 1719477951
BaseRepresentation
bin1110011000111…
…00110010000011
322102010101221101
413030130302003
5221400013011
615551035231
72663653042
oct714346203
9272111841
10120704131
1162152889
123450bb17
131c012582
1412060559
15a8e42c1
hex731cc83

120704131 has 16 divisors (see below), whose sum is σ = 137410560. Its totient is φ = 105321600.

The previous prime is 120704117. The next prime is 120704149. The reversal of 120704131 is 131407021.

It is a cyclic number.

It is not a de Polignac number, because 120704131 - 211 = 120702083 is a prime.

It is a super-2 number, since 2×1207041312 = 29138974480930322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120704099 and 120704108.

It is not an unprimeable number, because it can be changed into a prime (120704431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11206 + ... + 19156.

It is an arithmetic number, because the mean of its divisors is an integer number (8588160).

Almost surely, 2120704131 is an apocalyptic number.

120704131 is the 6949-th centered pentagonal number.

120704131 is a deficient number, since it is larger than the sum of its proper divisors (16706429).

120704131 is a wasteful number, since it uses less digits than its factorization.

120704131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8034.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 120704131 is about 10986.5431779063. The cubic root of 120704131 is about 494.2052764649.

The spelling of 120704131 in words is "one hundred twenty million, seven hundred four thousand, one hundred thirty-one".

Divisors: 1 17 19 47 323 799 893 7951 15181 135167 151069 373697 2568173 6352849 7100243 120704131