125520643 has 8 divisors (see below), whose sum is σ = 130227200. Its totient is φ = 120855240.

The previous prime is 125520623. The next prime is 125520677. The reversal of 125520643 is 346025521.

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 125520643 - 2¹⁷ = 125389571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125520623) 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, 4005 + ... + 16342.

It is an arithmetic number, because the mean of its divisors is an integer number (16278400).

Almost surely, 2^125520643 is an apocalyptic number.

125520643 is a deficient number, since it is larger than the sum of its proper divisors (4706557).

125520643 is a wasteful number, since it uses less digits than its factorization.

125520643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20577.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 125520643 is about 11203.5995555000. The cubic root of 125520643 is about 500.6932290893.

The spelling of 125520643 in words is "one hundred twenty-five million, five hundred twenty thousand, six hundred forty-three".