426609621 has 12 divisors (see below), whose sum is σ = 617037772. Its totient is φ = 284026176.

The previous prime is 426609583. The next prime is 426609629. The reversal of 426609621 is 126906624.

426609621 is a `hidden beast` number, since 4 + 26 + 6 + 0 + 9 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 106378596 + 320231025 = 10314^2 + 17895^2 .

It is not a de Polignac number, because 426609621 - 2¹⁸ = 426347477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426609629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24496 + ... + 38121.

Almost surely, 2^426609621 is an apocalyptic number.

It is an amenable number.

426609621 is a deficient number, since it is larger than the sum of its proper divisors (190428151).

426609621 is a wasteful number, since it uses less digits than its factorization.

426609621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63380 (or 63377 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 426609621 is about 20654.5302778833. The cubic root of 426609621 is about 752.7952703422.

The spelling of 426609621 in words is "four hundred twenty-six million, six hundred nine thousand, six hundred twenty-one".