42421975 has 6 divisors (see below), whose sum is σ = 52603280. Its totient is φ = 33937560.

The previous prime is 42421957. The next prime is 42421991. The reversal of 42421975 is 57912424.

It is a de Polignac number, because none of the positive numbers 2^k-42421975 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42421975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 848415 + ... + 848464.

Almost surely, 2^42421975 is an apocalyptic number.

42421975 is a deficient number, since it is larger than the sum of its proper divisors (10181305).

42421975 is a wasteful number, since it uses less digits than its factorization.

42421975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696889 (or 1696884 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 42421975 is about 6513.2154117609. The cubic root of 42421975 is about 348.7629115264.

The spelling of 42421975 in words is "forty-two million, four hundred twenty-one thousand, nine hundred seventy-five".