426532621 has 4 divisors (see below), whose sum is σ = 426574332. Its totient is φ = 426490912.

The previous prime is 426532597. The next prime is 426532637. The reversal of 426532621 is 126235624.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 391604521 + 34928100 = 19789^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 426532621 - 2¹⁹ = 426008333 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 (426532651) 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, 6081 + ... + 29833.

It is an arithmetic number, because the mean of its divisors is an integer number (106643583).

Almost surely, 2^426532621 is an apocalyptic number.

It is an amenable number.

426532621 is a deficient number, since it is larger than the sum of its proper divisors (41711).

426532621 is a wasteful number, since it uses less digits than its factorization.

426532621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41710.

The product of its digits is 17280, while the sum is 31.

The square root of 426532621 is about 20652.6661959177. Note that the first 3 decimals coincide. The cubic root of 426532621 is about 752.7499762210.

The spelling of 426532621 in words is "four hundred twenty-six million, five hundred thirty-two thousand, six hundred twenty-one".