421645005125 has 32 divisors (see below), whose sum is σ = 554225642880. Its totient is φ = 319379500800.

The previous prime is 421645005107. The next prime is 421645005161. The reversal of 421645005125 is 521500546124.

It is not a de Polignac number, because 421645005125 - 2¹⁰ = 421645004101 is a prime.

It is a super-2 number, since 2×421645005125² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4170422 + ... + 4270328.

It is an arithmetic number, because the mean of its divisors is an integer number (17319551340).

Almost surely, 2^421645005125 is an apocalyptic number.

It is an amenable number.

421645005125 is a deficient number, since it is larger than the sum of its proper divisors (132580637755).

421645005125 is a wasteful number, since it uses less digits than its factorization.

421645005125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101718 (or 101708 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 421645005125 in words is "four hundred twenty-one billion, six hundred forty-five million, five thousand, one hundred twenty-five".