421691752 has 16 divisors (see below), whose sum is σ = 825049440. Its totient is φ = 201678576.

The previous prime is 421691747. The next prime is 421691773. The reversal of 421691752 is 257196124.

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, 1145718 + ... + 1146085.

It is an arithmetic number, because the mean of its divisors is an integer number (51565590).

Almost surely, 2^421691752 is an apocalyptic number.

It is an amenable number.

421691752 is a deficient number, since it is larger than the sum of its proper divisors (403357688).

421691752 is a wasteful number, since it uses less digits than its factorization.

421691752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291832 (or 2291828 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 421691752 is about 20535.1345746747. The cubic root of 421691752 is about 749.8913928660.

The spelling of 421691752 in words is "four hundred twenty-one million, six hundred ninety-one thousand, seven hundred fifty-two".