421532919 has 6 divisors (see below), whose sum is σ = 608880896. Its totient is φ = 281021940.

The previous prime is 421532899. The next prime is 421532921. The reversal of 421532919 is 919235124.

It is not a de Polignac number, because 421532919 - 2⁵ = 421532887 is a prime.

It is a super-2 number, since 2×421532919² = 355380003601321122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421532819) 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 5 ways as a sum of consecutive naturals, for example, 23418487 + ... + 23418504.

Almost surely, 2^421532919 is an apocalyptic number.

421532919 is a deficient number, since it is larger than the sum of its proper divisors (187347977).

421532919 is a wasteful number, since it uses less digits than its factorization.

421532919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46836997 (or 46836994 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 421532919 is about 20531.2668630068. The cubic root of 421532919 is about 749.7972305177.

The spelling of 421532919 in words is "four hundred twenty-one million, five hundred thirty-two thousand, nine hundred nineteen".