42827421 has 48 divisors (see below), whose sum is σ = 72752064. Its totient is φ = 22208256.

The previous prime is 42827417. The next prime is 42827431. The reversal of 42827421 is 12472824.

It is not a de Polignac number, because 42827421 - 2² = 42827417 is a prime.

It is a super-2 number, since 2×42827421² = 3668375979022482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42827431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139350 + ... + 139656.

It is an arithmetic number, because the mean of its divisors is an integer number (1515668).

Almost surely, 2^42827421 is an apocalyptic number.

It is an amenable number.

42827421 is a deficient number, since it is larger than the sum of its proper divisors (29924643).

42827421 is a wasteful number, since it uses less digits than its factorization.

42827421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 403 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 42827421 is about 6544.2662690328. The cubic root of 42827421 is about 349.8704854135.

The spelling of 42827421 in words is "forty-two million, eight hundred twenty-seven thousand, four hundred twenty-one".