420660635 has 4 divisors (see below), whose sum is σ = 504792768. Its totient is φ = 336528504.

The previous prime is 420660623. The next prime is 420660649. The reversal of 420660635 is 536066024.

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

It is a cyclic number.

It is not a de Polignac number, because 420660635 - 2⁸ = 420660379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42066059 + ... + 42066068.

It is an arithmetic number, because the mean of its divisors is an integer number (126198192).

Almost surely, 2^420660635 is an apocalyptic number.

420660635 is a deficient number, since it is larger than the sum of its proper divisors (84132133).

420660635 is an equidigital number, since it uses as much as digits as its factorization.

420660635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84132132.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 420660635 is about 20510.0130424142. The cubic root of 420660635 is about 749.2796847123.

The spelling of 420660635 in words is "four hundred twenty million, six hundred sixty thousand, six hundred thirty-five".