125412521 has 8 divisors (see below), whose sum is σ = 142168320. Its totient is φ = 109672272.

The previous prime is 125412509. The next prime is 125412541. The reversal of 125412521 is 125214521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125412521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125412541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253625 + ... + 254118.

It is an arithmetic number, because the mean of its divisors is an integer number (17771040).

Almost surely, 2^125412521 is an apocalyptic number.

It is an amenable number.

125412521 is a deficient number, since it is larger than the sum of its proper divisors (16755799).

125412521 is a wasteful number, since it uses less digits than its factorization.

125412521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507775.

The product of its digits is 800, while the sum is 23.

The square root of 125412521 is about 11198.7731917385. The cubic root of 125412521 is about 500.5494240453.

The spelling of 125412521 in words is "one hundred twenty-five million, four hundred twelve thousand, five hundred twenty-one".