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131125067 = 1171111977
BaseRepresentation
bin1111101000011…
…00111101001011
3100010201211202222
413310030331023
5232032000232
621002244255
73151354553
oct764147513
9303654688
10131125067
1168020227
1237ab668b
13212208c8
14135b4163
15b7a1d12
hex7d0cf4b

131125067 has 4 divisors (see below), whose sum is σ = 131238216. Its totient is φ = 131011920.

The previous prime is 131125039. The next prime is 131125073. The reversal of 131125067 is 760521131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 760521131 = 2332132611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-131125067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131125867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54818 + ... + 57159.

It is an arithmetic number, because the mean of its divisors is an integer number (32809554).

Almost surely, 2131125067 is an apocalyptic number.

131125067 is a deficient number, since it is larger than the sum of its proper divisors (113149).

131125067 is a wasteful number, since it uses less digits than its factorization.

131125067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113148.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 131125067 is about 11450.9854161116. The cubic root of 131125067 is about 508.0368809378.

Adding to 131125067 its reverse (760521131), we get a palindrome (891646198).

The spelling of 131125067 in words is "one hundred thirty-one million, one hundred twenty-five thousand, sixty-seven".

Divisors: 1 1171 111977 131125067