125560091 has 2 divisors, whose sum is σ = 125560092. Its totient is φ = 125560090.

The previous prime is 125560051. The next prime is 125560109. The reversal of 125560091 is 190065521.

Together with next prime (125560109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125560091 - 2²⁶ = 58451227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125560031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62780045 + 62780046.

It is an arithmetic number, because the mean of its divisors is an integer number (62780046).

Almost surely, 2^125560091 is an apocalyptic number.

125560091 is a deficient number, since it is larger than the sum of its proper divisors (1).

125560091 is an equidigital number, since it uses as much as digits as its factorization.

125560091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 125560091 is about 11205.3599228226. The cubic root of 125560091 is about 500.7456753836.

The spelling of 125560091 in words is "one hundred twenty-five million, five hundred sixty thousand, ninety-one".