274812021 has 40 divisors (see below), whose sum is σ = 474211584. Its totient is φ = 156746880.

The previous prime is 274812017. The next prime is 274812047. The reversal of 274812021 is 120218472.

It is not a de Polignac number, because 274812021 - 2² = 274812017 is a prime.

It is a super-2 number, since 2×274812021² = 151043293772208882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274812071) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6076 + ... + 24218.

Almost surely, 2^274812021 is an apocalyptic number.

It is an amenable number.

274812021 is a deficient number, since it is larger than the sum of its proper divisors (199399563).

274812021 is a wasteful number, since it uses less digits than its factorization.

274812021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18183 (or 18174 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 274812021 is about 16577.4552027746. The cubic root of 274812021 is about 650.1475176031.

The spelling of 274812021 in words is "two hundred seventy-four million, eight hundred twelve thousand, twenty-one".