420745252 has 6 divisors (see below), whose sum is σ = 736304198. Its totient is φ = 210372624.

The previous prime is 420745249. The next prime is 420745301. The reversal of 420745252 is 252547024.

It can be written as a sum of positive squares in only one way, i.e., 415099876 + 5645376 = 20374^2 + 2376^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52593153 + ... + 52593160.

Almost surely, 2^420745252 is an apocalyptic number.

It is an amenable number.

420745252 is a deficient number, since it is larger than the sum of its proper divisors (315558946).

420745252 is a wasteful number, since it uses less digits than its factorization.

420745252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105186317 (or 105186315 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 420745252 is about 20512.0757603905. The cubic root of 420745252 is about 749.3299212079.

The spelling of 420745252 in words is "four hundred twenty million, seven hundred forty-five thousand, two hundred fifty-two".