420452402 has 4 divisors (see below), whose sum is σ = 630678606. Its totient is φ = 210226200.

The previous prime is 420452401. The next prime is 420452413. The reversal of 420452402 is 204254024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 419389441 + 1062961 = 20479^2 + 1031^2 .

It is not an unprimeable number, because it can be changed into a prime (420452401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105113099 + ... + 105113102.

Almost surely, 2^420452402 is an apocalyptic number.

420452402 is a deficient number, since it is larger than the sum of its proper divisors (210226204).

420452402 is a wasteful number, since it uses less digits than its factorization.

420452402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210226203.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 420452402 is about 20504.9360398905. The cubic root of 420452402 is about 749.1560296045.

The spelling of 420452402 in words is "four hundred twenty million, four hundred fifty-two thousand, four hundred two".