125810291 has 2 divisors, whose sum is σ = 125810292. Its totient is φ = 125810290.

The previous prime is 125810257. The next prime is 125810309. The reversal of 125810291 is 192018521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125810291 is a prime.

It is not a weakly prime, because it can be changed into another prime (125810221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62905145 + 62905146.

It is an arithmetic number, because the mean of its divisors is an integer number (62905146).

Almost surely, 2^125810291 is an apocalyptic number.

125810291 is a deficient number, since it is larger than the sum of its proper divisors (1).

125810291 is an equidigital number, since it uses as much as digits as its factorization.

125810291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 125810291 is about 11216.5186666809. The cubic root of 125810291 is about 501.0780618945.

The spelling of 125810291 in words is "one hundred twenty-five million, eight hundred ten thousand, two hundred ninety-one".