125528591 has 2 divisors, whose sum is σ = 125528592. Its totient is φ = 125528590.

The previous prime is 125528563. The next prime is 125528609. The reversal of 125528591 is 195825521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125528591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125528521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62764295 + 62764296.

It is an arithmetic number, because the mean of its divisors is an integer number (62764296).

Almost surely, 2^125528591 is an apocalyptic number.

125528591 is a deficient number, since it is larger than the sum of its proper divisors (1).

125528591 is an equidigital number, since it uses as much as digits as its factorization.

125528591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 38.

The square root of 125528591 is about 11203.9542573147. The cubic root of 125528591 is about 500.7037968751.

The spelling of 125528591 in words is "one hundred twenty-five million, five hundred twenty-eight thousand, five hundred ninety-one".