421167957 has 16 divisors (see below), whose sum is σ = 663911040. Its totient is φ = 232368192.

The previous prime is 421167917. The next prime is 421167983. The reversal of 421167957 is 759761124.

It is a happy number.

It is not a de Polignac number, because 421167957 - 2⁸ = 421167701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421167907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345178 + ... + 346395.

It is an arithmetic number, because the mean of its divisors is an integer number (41494440).

Almost surely, 2^421167957 is an apocalyptic number.

It is an amenable number.

421167957 is a deficient number, since it is larger than the sum of its proper divisors (242743083).

421167957 is a wasteful number, since it uses less digits than its factorization.

421167957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691612.

The product of its digits is 105840, while the sum is 42.

The square root of 421167957 is about 20522.3769822114. The cubic root of 421167957 is about 749.5807772690.

The spelling of 421167957 in words is "four hundred twenty-one million, one hundred sixty-seven thousand, nine hundred fifty-seven".