420641252 has 6 divisors (see below), whose sum is σ = 736122198. Its totient is φ = 210320624.

The previous prime is 420641237. The next prime is 420641281. The reversal of 420641252 is 252146024.

It can be written as a sum of positive squares in only one way, i.e., 418775296 + 1865956 = 20464^2 + 1366^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52580153 + ... + 52580160.

It is an arithmetic number, because the mean of its divisors is an integer number (122687033).

Almost surely, 2^420641252 is an apocalyptic number.

It is an amenable number.

420641252 is a deficient number, since it is larger than the sum of its proper divisors (315480946).

420641252 is a wasteful number, since it uses less digits than its factorization.

420641252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105160317 (or 105160315 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 420641252 is about 20509.5405116741. The cubic root of 420641252 is about 749.2681762183.

Adding to 420641252 its reverse (252146024), we get a palindrome (672787276).

The spelling of 420641252 in words is "four hundred twenty million, six hundred forty-one thousand, two hundred fifty-two".