42373521 has 24 divisors (see below), whose sum is σ = 64184640. Its totient is φ = 26886816.

The previous prime is 42373517. The next prime is 42373549. The reversal of 42373521 is 12537324.

It is not a de Polignac number, because 42373521 - 2² = 42373517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42373501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56970 + ... + 57708.

It is an arithmetic number, because the mean of its divisors is an integer number (2674360).

Almost surely, 2^42373521 is an apocalyptic number.

It is an amenable number.

42373521 is a deficient number, since it is larger than the sum of its proper divisors (21811119).

42373521 is a wasteful number, since it uses less digits than its factorization.

42373521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1042 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 42373521 is about 6509.4946808489. The cubic root of 42373521 is about 348.6300763142.

The spelling of 42373521 in words is "forty-two million, three hundred seventy-three thousand, five hundred twenty-one".