125845591 has 2 divisors, whose sum is σ = 125845592. Its totient is φ = 125845590.

The previous prime is 125845579. The next prime is 125845609. The reversal of 125845591 is 195548521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125845591 - 2⁹ = 125845079 is a prime.

It is a super-2 number, since 2×125845591² = 31674225548278562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125845541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62922795 + 62922796.

It is an arithmetic number, because the mean of its divisors is an integer number (62922796).

Almost surely, 2^125845591 is an apocalyptic number.

125845591 is a deficient number, since it is larger than the sum of its proper divisors (1).

125845591 is an equidigital number, since it uses as much as digits as its factorization.

125845591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 40.

The square root of 125845591 is about 11218.0921283434. The cubic root of 125845591 is about 501.1249218702.

The spelling of 125845591 in words is "one hundred twenty-five million, eight hundred forty-five thousand, five hundred ninety-one".