125442623 has 2 divisors, whose sum is σ = 125442624. Its totient is φ = 125442622.

The previous prime is 125442619. The next prime is 125442683. The reversal of 125442623 is 326244521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125442623 - 2² = 125442619 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125442613) 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, 62721311 + 62721312.

It is an arithmetic number, because the mean of its divisors is an integer number (62721312).

Almost surely, 2^125442623 is an apocalyptic number.

125442623 is a deficient number, since it is larger than the sum of its proper divisors (1).

125442623 is an equidigital number, since it uses as much as digits as its factorization.

125442623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 29.

The square root of 125442623 is about 11200.1170976021. The cubic root of 125442623 is about 500.5894687800.

The spelling of 125442623 in words is "one hundred twenty-five million, four hundred forty-two thousand, six hundred twenty-three".