125547521 has 8 divisors (see below), whose sum is σ = 137484864. Its totient is φ = 113697520.

The previous prime is 125547493. The next prime is 125547523. The reversal of 125547521 is 125745521.

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

It is a cyclic number.

It is not a de Polignac number, because 125547521 - 2²⁶ = 58438657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125547523) 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, 18806 + ... + 24591.

It is an arithmetic number, because the mean of its divisors is an integer number (17185608).

Almost surely, 2^125547521 is an apocalyptic number.

125547521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125547521 is a deficient number, since it is larger than the sum of its proper divisors (11937343).

125547521 is a wasteful number, since it uses less digits than its factorization.

125547521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43671.

The product of its digits is 14000, while the sum is 32.

The square root of 125547521 is about 11204.7990164929. The cubic root of 125547521 is about 500.7289647044.

The spelling of 125547521 in words is "one hundred twenty-five million, five hundred forty-seven thousand, five hundred twenty-one".