421906052 has 6 divisors (see below), whose sum is σ = 738335598. Its totient is φ = 210953024.

The previous prime is 421906049. The next prime is 421906081. The reversal of 421906052 is 250609124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 355548736 + 66357316 = 18856^2 + 8146^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52738253 + ... + 52738260.

It is an arithmetic number, because the mean of its divisors is an integer number (123055933).

Almost surely, 2^421906052 is an apocalyptic number.

It is an amenable number.

421906052 is a deficient number, since it is larger than the sum of its proper divisors (316429546).

421906052 is a wasteful number, since it uses less digits than its factorization.

421906052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105476517 (or 105476515 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 421906052 is about 20540.3517983505. The cubic root of 421906052 is about 750.0184007337.

The spelling of 421906052 in words is "four hundred twenty-one million, nine hundred six thousand, fifty-two".