421155412 has 18 divisors (see below), whose sum is σ = 739979898. Its totient is φ = 209735568.

The previous prime is 421155377. The next prime is 421155421. The reversal of 421155412 is 214551124.

It can be written as a sum of positive squares in only one way, i.e., 418857156 + 2298256 = 20466^2 + 1516^2 .

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, 574198 + ... + 574930.

Almost surely, 2^421155412 is an apocalyptic number.

It is an amenable number.

421155412 is a deficient number, since it is larger than the sum of its proper divisors (318824486).

421155412 is an equidigital number, since it uses as much as digits as its factorization.

421155412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1114 counting only the distinct ones).

The product of its digits is 1600, while the sum is 25.

The square root of 421155412 is about 20522.0713379522. The cubic root of 421155412 is about 749.5733348033.

The spelling of 421155412 in words is "four hundred twenty-one million, one hundred fifty-five thousand, four hundred twelve".