420821246 has 8 divisors (see below), whose sum is σ = 631403640. Its totient is φ = 210353368.

The previous prime is 420821243. The next prime is 420821251. The reversal of 420821246 is 642128024.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420821243) 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, 18761 + ... + 34548.

It is an arithmetic number, because the mean of its divisors is an integer number (78925455).

Almost surely, 2^420821246 is an apocalyptic number.

420821246 is a deficient number, since it is larger than the sum of its proper divisors (210582394).

420821246 is a wasteful number, since it uses less digits than its factorization.

420821246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57258.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 420821246 is about 20513.9280977584. The cubic root of 420821246 is about 749.3750325508.

The spelling of 420821246 in words is "four hundred twenty million, eight hundred twenty-one thousand, two hundred forty-six".