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120131261 is a prime number
BaseRepresentation
bin1110010100100…
…00111010111101
322101001022002222
413022100322331
5221223200021
615530455125
72656045625
oct712207275
9271038088
10120131261
11618a1438
12342944a5
131bb718b3
1411d51885
15a82e6ab
hex7290ebd

120131261 has 2 divisors, whose sum is σ = 120131262. Its totient is φ = 120131260.

The previous prime is 120131233. The next prime is 120131273. The reversal of 120131261 is 162131021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118679236 + 1452025 = 10894^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 120131261 - 210 = 120130237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120131161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60065630 + 60065631.

It is an arithmetic number, because the mean of its divisors is an integer number (60065631).

Almost surely, 2120131261 is an apocalyptic number.

It is an amenable number.

120131261 is a deficient number, since it is larger than the sum of its proper divisors (1).

120131261 is an equidigital number, since it uses as much as digits as its factorization.

120131261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 120131261 is about 10960.4407301896. The cubic root of 120131261 is about 493.4221923677.

Adding to 120131261 its reverse (162131021), we get a palindrome (282262282).

The spelling of 120131261 in words is "one hundred twenty million, one hundred thirty-one thousand, two hundred sixty-one".