189125021 has 8 divisors (see below), whose sum is σ = 197703744. Its totient is φ = 180576000.

The previous prime is 189124981. The next prime is 189125029. The reversal of 189125021 is 120521981.

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 189125021 - 2¹⁴ = 189108637 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 (189125029) 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, 6146 + ... + 20396.

It is an arithmetic number, because the mean of its divisors is an integer number (24712968).

Almost surely, 2^189125021 is an apocalyptic number.

It is an amenable number.

189125021 is a deficient number, since it is larger than the sum of its proper divisors (8578723).

189125021 is a wasteful number, since it uses less digits than its factorization.

189125021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14851.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 189125021 is about 13752.2733029852. The cubic root of 189125021 is about 574.0058648083.

The spelling of 189125021 in words is "one hundred eighty-nine million, one hundred twenty-five thousand, twenty-one".