421605790 has 16 divisors (see below), whose sum is σ = 759789360. Its totient is φ = 168442560.

The previous prime is 421605757. The next prime is 421605791. The reversal of 421605790 is 97506124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421605791) 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 in 7 ways as a sum of consecutive naturals, for example, 15951 + ... + 33130.

It is an arithmetic number, because the mean of its divisors is an integer number (47486835).

Almost surely, 2^421605790 is an apocalyptic number.

421605790 is a deficient number, since it is larger than the sum of its proper divisors (338183570).

421605790 is a wasteful number, since it uses less digits than its factorization.

421605790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49947.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 421605790 is about 20533.0414210852. The cubic root of 421605790 is about 749.8404342022.

The spelling of 421605790 in words is "four hundred twenty-one million, six hundred five thousand, seven hundred ninety".