426215621 has 8 divisors (see below), whose sum is σ = 473808384. Its totient is φ = 380738160.

The previous prime is 426215597. The next prime is 426215633. The reversal of 426215621 is 126512624.

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 426215621 - 2¹⁸ = 425953477 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 (426215681) 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, 528401 + ... + 529206.

It is an arithmetic number, because the mean of its divisors is an integer number (59226048).

Almost surely, 2^426215621 is an apocalyptic number.

It is an amenable number.

426215621 is a deficient number, since it is larger than the sum of its proper divisors (47592763).

426215621 is a wasteful number, since it uses less digits than its factorization.

426215621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057651.

The product of its digits is 5760, while the sum is 29.

The square root of 426215621 is about 20644.9902155462. The cubic root of 426215621 is about 752.5634481808.

The spelling of 426215621 in words is "four hundred twenty-six million, two hundred fifteen thousand, six hundred twenty-one".