42854721 has 32 divisors (see below), whose sum is σ = 72764160. Its totient is φ = 21821184.

The previous prime is 42854719. The next prime is 42854729. The reversal of 42854721 is 12745824.

It is not a de Polignac number, because 42854721 - 2¹ = 42854719 is a prime.

It is a super-2 number, since 2×42854721² = 3673054223975682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42854729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5211 + ... + 10623.

It is an arithmetic number, because the mean of its divisors is an integer number (2273880).

Almost surely, 2^42854721 is an apocalyptic number.

It is an amenable number.

42854721 is a deficient number, since it is larger than the sum of its proper divisors (29909439).

42854721 is a wasteful number, since it uses less digits than its factorization.

42854721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465.

The product of its digits is 17920, while the sum is 33.

The square root of 42854721 is about 6546.3517320718. The cubic root of 42854721 is about 349.9448103455.

The spelling of 42854721 in words is "forty-two million, eight hundred fifty-four thousand, seven hundred twenty-one".