125558591 has 2 divisors, whose sum is σ = 125558592. Its totient is φ = 125558590.

The previous prime is 125558569. The next prime is 125558597. The reversal of 125558591 is 195855521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125558591 - 2¹⁸ = 125296447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125558597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62779295 + 62779296.

It is an arithmetic number, because the mean of its divisors is an integer number (62779296).

Almost surely, 2^125558591 is an apocalyptic number.

125558591 is a deficient number, since it is larger than the sum of its proper divisors (1).

125558591 is an equidigital number, since it uses as much as digits as its factorization.

125558591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90000, while the sum is 41.

The square root of 125558591 is about 11205.2929903684. The cubic root of 125558591 is about 500.7436813278.

The spelling of 125558591 in words is "one hundred twenty-five million, five hundred fifty-eight thousand, five hundred ninety-one".