421220654 has 8 divisors (see below), whose sum is σ = 648907608. Its totient is φ = 204918120.

The previous prime is 421220641. The next prime is 421220659. The reversal of 421220654 is 456022124.

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 (421220659) 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, 2846012 + ... + 2846159.

It is an arithmetic number, because the mean of its divisors is an integer number (81113451).

Almost surely, 2^421220654 is an apocalyptic number.

421220654 is a deficient number, since it is larger than the sum of its proper divisors (227686954).

421220654 is a wasteful number, since it uses less digits than its factorization.

421220654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5692210.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 421220654 is about 20523.6608332919. The cubic root of 421220654 is about 749.6120387568.

Adding to 421220654 its reverse (456022124), we get a palindrome (877242778).

The spelling of 421220654 in words is "four hundred twenty-one million, two hundred twenty thousand, six hundred fifty-four".