420920502 has 8 divisors (see below), whose sum is σ = 841841016. Its totient is φ = 140306832.

The previous prime is 420920501. The next prime is 420920519. The reversal of 420920502 is 205029024.

It is a sphenic number, since it is the product of 3 distinct primes.

420920502 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420920501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35076703 + ... + 35076714.

It is an arithmetic number, because the mean of its divisors is an integer number (105230127).

Almost surely, 2^420920502 is an apocalyptic number.

420920502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420920502 is a wasteful number, since it uses less digits than its factorization.

420920502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70153422.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 420920502 is about 20516.3471894975. The cubic root of 420920502 is about 749.4339444378.

Adding to 420920502 its reverse (205029024), we get a palindrome (625949526).

The spelling of 420920502 in words is "four hundred twenty million, nine hundred twenty thousand, five hundred two".