421957165 has 8 divisors (see below), whose sum is σ = 578684160. Its totient is φ = 289342032.

The previous prime is 421957141. The next prime is 421957171. The reversal of 421957165 is 561759124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421957165 - 2⁹ = 421956653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6027925 + ... + 6027994.

It is an arithmetic number, because the mean of its divisors is an integer number (72335520).

Almost surely, 2^421957165 is an apocalyptic number.

It is an amenable number.

421957165 is a deficient number, since it is larger than the sum of its proper divisors (156726995).

421957165 is a wasteful number, since it uses less digits than its factorization.

421957165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12055931.

The product of its digits is 75600, while the sum is 40.

The square root of 421957165 is about 20541.5959701285. The cubic root of 421957165 is about 750.0486872097.

The spelling of 421957165 in words is "four hundred twenty-one million, nine hundred fifty-seven thousand, one hundred sixty-five".