426621621 has 8 divisors (see below), whose sum is σ = 569800224. Its totient is φ = 283928720.

The previous prime is 426621557. The next prime is 426621631. The reversal of 426621621 is 126126624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 426621621 - 2⁶ = 426621557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426621631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119370 + ... + 122891.

It is an arithmetic number, because the mean of its divisors is an integer number (71225028).

Almost surely, 2^426621621 is an apocalyptic number.

It is an amenable number.

426621621 is a deficient number, since it is larger than the sum of its proper divisors (143178603).

426621621 is a wasteful number, since it uses less digits than its factorization.

426621621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242851.

The product of its digits is 6912, while the sum is 30.

The square root of 426621621 is about 20654.8207690118. The cubic root of 426621621 is about 752.8023286754.

The spelling of 426621621 in words is "four hundred twenty-six million, six hundred twenty-one thousand, six hundred twenty-one".