626426421 has 8 divisors (see below), whose sum is σ = 884366784. Its totient is φ = 393051840.

The previous prime is 626426417. The next prime is 626426429. The reversal of 626426421 is 124624626.

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

It is not a de Polignac number, because 626426421 - 2² = 626426417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626426429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6141385 + ... + 6141486.

It is an arithmetic number, because the mean of its divisors is an integer number (110545848).

Almost surely, 2^626426421 is an apocalyptic number.

It is an amenable number.

626426421 is a deficient number, since it is larger than the sum of its proper divisors (257940363).

626426421 is a wasteful number, since it uses less digits than its factorization.

626426421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12282891.

The product of its digits is 27648, while the sum is 33.

The square root of 626426421 is about 25028.5121611334. The cubic root of 626426421 is about 855.6379179650.

The spelling of 626426421 in words is "six hundred twenty-six million, four hundred twenty-six thousand, four hundred twenty-one".