125305591 has 2 divisors, whose sum is σ = 125305592. Its totient is φ = 125305590.

The previous prime is 125305559. The next prime is 125305597. The reversal of 125305591 is 195503521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125305591 - 2⁵ = 125305559 is a prime.

It is a super-2 number, since 2×125305591² = 31402982271718562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125305597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62652795 + 62652796.

It is an arithmetic number, because the mean of its divisors is an integer number (62652796).

Almost surely, 2^125305591 is an apocalyptic number.

125305591 is a deficient number, since it is larger than the sum of its proper divisors (1).

125305591 is an equidigital number, since it uses as much as digits as its factorization.

125305591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 125305591 is about 11193.9979899945. The cubic root of 125305591 is about 500.4071230783.

The spelling of 125305591 in words is "one hundred twenty-five million, three hundred five thousand, five hundred ninety-one".