426506621 has 4 divisors (see below), whose sum is σ = 427124544. Its totient is φ = 425888700.

The previous prime is 426506611. The next prime is 426506651. The reversal of 426506621 is 126605624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426506621 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 (426506611) 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, 307925 + ... + 309306.

It is an arithmetic number, because the mean of its divisors is an integer number (106781136).

Almost surely, 2^426506621 is an apocalyptic number.

It is an amenable number.

426506621 is a deficient number, since it is larger than the sum of its proper divisors (617923).

426506621 is an equidigital number, since it uses as much as digits as its factorization.

426506621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617922.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 426506621 is about 20652.0367276450. The cubic root of 426506621 is about 752.7346808711.

The spelling of 426506621 in words is "four hundred twenty-six million, five hundred six thousand, six hundred twenty-one".