421123616 has 24 divisors (see below), whose sum is σ = 857678220. Its totient is φ = 203300608.

The previous prime is 421123607. The next prime is 421123627. The reversal of 421123616 is 616321124.

It can be written as a sum of positive squares in 2 ways, for example, as 415344400 + 5779216 = 20380^2 + 2404^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225971 + ... + 227826.

Almost surely, 2^421123616 is an apocalyptic number.

It is an amenable number.

421123616 is an abundant number, since it is smaller than the sum of its proper divisors (436554604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421123616 is a wasteful number, since it uses less digits than its factorization.

421123616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453836 (or 453828 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 421123616 is about 20521.2966451928. The cubic root of 421123616 is about 749.5544707981.

The spelling of 421123616 in words is "four hundred twenty-one million, one hundred twenty-three thousand, six hundred sixteen".