125389421 has 4 divisors (see below), whose sum is σ = 125413632. Its totient is φ = 125365212.

The previous prime is 125389409. The next prime is 125389427. The reversal of 125389421 is 124983521.

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 a de Polignac number, because none of the positive numbers 2^k-125389421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125389427) 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, 845 + ... + 15858.

It is an arithmetic number, because the mean of its divisors is an integer number (31353408).

Almost surely, 2^125389421 is an apocalyptic number.

It is an amenable number.

125389421 is a deficient number, since it is larger than the sum of its proper divisors (24211).

125389421 is an equidigital number, since it uses as much as digits as its factorization.

125389421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24210.

The product of its digits is 17280, while the sum is 35.

The square root of 125389421 is about 11197.7417812700. The cubic root of 125389421 is about 500.5186897359.

The spelling of 125389421 in words is "one hundred twenty-five million, three hundred eighty-nine thousand, four hundred twenty-one".