426166521 has 8 divisors (see below), whose sum is σ = 619878624. Its totient is φ = 258282720.

The previous prime is 426166519. The next prime is 426166537. The reversal of 426166521 is 125661624.

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

It is not a de Polignac number, because 426166521 - 2¹ = 426166519 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 12914137 = 426166521 / (4 + 2 + 6 + 1 + 6 + 6 + 5 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (426166501) 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, 6457036 + ... + 6457101.

It is an arithmetic number, because the mean of its divisors is an integer number (77484828).

Almost surely, 2^426166521 is an apocalyptic number.

It is an amenable number.

426166521 is a deficient number, since it is larger than the sum of its proper divisors (193712103).

426166521 is a wasteful number, since it uses less digits than its factorization.

426166521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12914151.

The product of its digits is 17280, while the sum is 33.

The square root of 426166521 is about 20643.8010308179. The cubic root of 426166521 is about 752.5345486579.

The spelling of 426166521 in words is "four hundred twenty-six million, one hundred sixty-six thousand, five hundred twenty-one".