420421342449975 has 24 divisors (see below), whose sum is σ = 695108220204240. Its totient is φ = 224220973816320.

The previous prime is 420421342449971. The next prime is 420421342449989. The reversal of 420421342449975 is 579944243124024.

It is a happy number.

It is not a de Polignac number, because 420421342449975 - 2² = 420421342449971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420421342449971) 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, 42250210 + ... + 51243759.

It is an arithmetic number, because the mean of its divisors is an integer number (28962842508510).

Almost surely, 2^{420421342449975} is an apocalyptic number.

420421342449975 is a deficient number, since it is larger than the sum of its proper divisors (274686877754265).

420421342449975 is a wasteful number, since it uses less digits than its factorization.

420421342449975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93553939 (or 93553934 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 60.

The spelling of 420421342449975 in words is "four hundred twenty trillion, four hundred twenty-one billion, three hundred forty-two million, four hundred forty-nine thousand, nine hundred seventy-five".