421251672 has 16 divisors (see below), whose sum is σ = 1053129240. Its totient is φ = 140417216.

The previous prime is 421251661. The next prime is 421251737. The reversal of 421251672 is 276152124.

It is a congruent number.

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, 8776053 + ... + 8776100.

Almost surely, 2^421251672 is an apocalyptic number.

It is an amenable number.

421251672 is an abundant number, since it is smaller than the sum of its proper divisors (631877568).

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

421251672 is a wasteful number, since it uses less digits than its factorization.

421251672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17552162 (or 17552158 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 421251672 is about 20524.4164837883. The cubic root of 421251672 is about 749.6304383733.

The spelling of 421251672 in words is "four hundred twenty-one million, two hundred fifty-one thousand, six hundred seventy-two".