1872920521 has 8 divisors (see below), whose sum is σ = 2017396224. Its totient is φ = 1733698560.

The previous prime is 1872920509. The next prime is 1872920527. The reversal of 1872920521 is 1250292781.

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

It is not a de Polignac number, because 1872920521 - 2²¹ = 1870823369 is a prime.

It is a super-2 number, since 2×1872920521² = 7015662555965822882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1872920527) 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, 1312696 + ... + 1314121.

It is an arithmetic number, because the mean of its divisors is an integer number (252174528).

Almost surely, 2^1872920521 is an apocalyptic number.

It is an amenable number.

1872920521 is a deficient number, since it is larger than the sum of its proper divisors (144475703).

1872920521 is a wasteful number, since it uses less digits than its factorization.

1872920521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626871.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1872920521 is about 43277.2517727270. The cubic root of 1872920521 is about 1232.6500075391.

The spelling of 1872920521 in words is "one billion, eight hundred seventy-two million, nine hundred twenty thousand, five hundred twenty-one".