21125192 has 16 divisors (see below), whose sum is σ = 43210800. Its totient is φ = 9602320.

The previous prime is 21125183. The next prime is 21125219. The reversal of 21125192 is 29152112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119942 + ... + 120117.

It is an arithmetic number, because the mean of its divisors is an integer number (2700675).

Almost surely, 2^21125192 is an apocalyptic number.

21125192 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21125192 is an abundant number, since it is smaller than the sum of its proper divisors (22085608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21125192 is a wasteful number, since it uses less digits than its factorization.

21125192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240076 (or 240072 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 21125192 is about 4596.2149645116. The cubic root of 21125192 is about 276.4395781763.

The spelling of 21125192 in words is "twenty-one million, one hundred twenty-five thousand, one hundred ninety-two".