125641819 has 2 divisors, whose sum is σ = 125641820. Its totient is φ = 125641818.

The previous prime is 125641807. The next prime is 125641871. The reversal of 125641819 is 918146521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125641819 - 2⁵ = 125641787 is a prime.

It is a super-2 number, since 2×125641819² = 31571733363257522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125641619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62820909 + 62820910.

It is an arithmetic number, because the mean of its divisors is an integer number (62820910).

Almost surely, 2^125641819 is an apocalyptic number.

125641819 is a deficient number, since it is larger than the sum of its proper divisors (1).

125641819 is an equidigital number, since it uses as much as digits as its factorization.

125641819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 125641819 is about 11209.0061557660. The cubic root of 125641819 is about 500.8542981846.

The spelling of 125641819 in words is "one hundred twenty-five million, six hundred forty-one thousand, eight hundred nineteen".