420402746 has 4 divisors (see below), whose sum is σ = 630604122. Its totient is φ = 210201372.

The previous prime is 420402743. The next prime is 420402751. The reversal of 420402746 is 647204024.

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., 367680625 + 52722121 = 19175^2 + 7261^2 .

It is not an unprimeable number, because it can be changed into a prime (420402743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100685 + ... + 105100688.

Almost surely, 2^420402746 is an apocalyptic number.

420402746 is a deficient number, since it is larger than the sum of its proper divisors (210201376).

420402746 is a wasteful number, since it uses less digits than its factorization.

420402746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210201375.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 420402746 is about 20503.7251737337. The cubic root of 420402746 is about 749.1265363284.

The spelling of 420402746 in words is "four hundred twenty million, four hundred two thousand, seven hundred forty-six".