421506412 has 24 divisors (see below), whose sum is σ = 778593200. Its totient is φ = 199112256.

The previous prime is 421506409. The next prime is 421506439. The reversal of 421506412 is 214605124.

It is a happy number.

It is a super-2 number, since 2×421506412² = 355335310714227488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20914 + ... + 35782.

Almost surely, 2^421506412 is an apocalyptic number.

It is an amenable number.

421506412 is a deficient number, since it is larger than the sum of its proper divisors (357086788).

421506412 is a wasteful number, since it uses less digits than its factorization.

421506412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15265 (or 15263 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 421506412 is about 20530.6213252303. The cubic root of 421506412 is about 749.7815138394.

The spelling of 421506412 in words is "four hundred twenty-one million, five hundred six thousand, four hundred twelve".