125439629 has 4 divisors (see below), whose sum is σ = 143359584. Its totient is φ = 107519676.

The previous prime is 125439571. The next prime is 125439641. The reversal of 125439629 is 926934521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125439629 - 2⁸ = 125439373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125439659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8959967 + ... + 8959980.

It is an arithmetic number, because the mean of its divisors is an integer number (35839896).

Almost surely, 2^125439629 is an apocalyptic number.

It is an amenable number.

125439629 is a deficient number, since it is larger than the sum of its proper divisors (17919955).

125439629 is an equidigital number, since it uses as much as digits as its factorization.

125439629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17919954.

The product of its digits is 116640, while the sum is 41.

The square root of 125439629 is about 11199.9834374878. The cubic root of 125439629 is about 500.5854861443.

The spelling of 125439629 in words is "one hundred twenty-five million, four hundred thirty-nine thousand, six hundred twenty-nine".