42420624 has 20 divisors (see below), whose sum is σ = 109586736. Its totient is φ = 14140192.

The previous prime is 42420619. The next prime is 42420659. The reversal of 42420624 is 42602424.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 42420594 and 42420603.

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, 441834 + ... + 441929.

Almost surely, 2^42420624 is an apocalyptic number.

It is an amenable number.

42420624 is an abundant number, since it is smaller than the sum of its proper divisors (67166112).

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

42420624 is a wasteful number, since it uses less digits than its factorization.

42420624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883774 (or 883768 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 42420624 is about 6513.1116987197. Note that the first 3 decimals coincide. The cubic root of 42420624 is about 348.7592091709.

The spelling of 42420624 in words is "forty-two million, four hundred twenty thousand, six hundred twenty-four".