421517252 has 12 divisors (see below), whose sum is σ = 794397996. Its totient is φ = 194546400.

The previous prime is 421517237. The next prime is 421517267. The reversal of 421517252 is 252715124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421517237) and next prime (421517267).

It can be written as a sum of positive squares in 2 ways, for example, as 125126596 + 296390656 = 11186^2 + 17216^2 .

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 3 ways as a sum of consecutive naturals, for example, 4052999 + ... + 4053102.

It is an arithmetic number, because the mean of its divisors is an integer number (66199833).

Almost surely, 2^421517252 is an apocalyptic number.

It is an amenable number.

421517252 is a deficient number, since it is larger than the sum of its proper divisors (372880744).

421517252 is a wasteful number, since it uses less digits than its factorization.

421517252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106118 (or 8106116 counting only the distinct ones).

The product of its digits is 5600, while the sum is 29.

The square root of 421517252 is about 20530.8853194401. The cubic root of 421517252 is about 749.7879412323.

The spelling of 421517252 in words is "four hundred twenty-one million, five hundred seventeen thousand, two hundred fifty-two".