42621524 has 36 divisors (see below), whose sum is σ = 82851552. Its totient is φ = 19169040.

The previous prime is 42621457. The next prime is 42621529. The reversal of 42621524 is 42512624.

It is a junction number, because it is equal to n+sod(n) for n = 42621493 and 42621502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42621529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51377 + ... + 52199.

It is an arithmetic number, because the mean of its divisors is an integer number (2301432).

Almost surely, 2^42621524 is an apocalyptic number.

42621524 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42621524 is a deficient number, since it is larger than the sum of its proper divisors (40230028).

42621524 is a wasteful number, since it uses less digits than its factorization.

42621524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956 (or 943 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 42621524 is about 6528.5162173345. The cubic root of 42621524 is about 349.3089056820.

Subtracting from 42621524 its reverse (42512624), we obtain a square (108900 = 330²).

The spelling of 42621524 in words is "forty-two million, six hundred twenty-one thousand, five hundred twenty-four".