125644553 has 8 divisors (see below), whose sum is σ = 126462336. Its totient is φ = 124830000.

The previous prime is 125644517. The next prime is 125644573. The reversal of 125644553 is 355446521.

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 125644553 - 2¹² = 125640457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125644573) 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, 166928 + ... + 167678.

It is an arithmetic number, because the mean of its divisors is an integer number (15807792).

Almost surely, 2^125644553 is an apocalyptic number.

It is an amenable number.

125644553 is a deficient number, since it is larger than the sum of its proper divisors (817783).

125644553 is an equidigital number, since it uses as much as digits as its factorization.

125644553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615.

The product of its digits is 72000, while the sum is 35.

The square root of 125644553 is about 11209.1281106070. The cubic root of 125644553 is about 500.8579310666.

The spelling of 125644553 in words is "one hundred twenty-five million, six hundred forty-four thousand, five hundred fifty-three".