426105921 has 4 divisors (see below), whose sum is σ = 568141232. Its totient is φ = 284070612.

The previous prime is 426105919. The next prime is 426105929. The reversal of 426105921 is 129501624.

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 not a de Polignac number, because 426105921 - 2¹ = 426105919 is a prime.

It is a super-2 number, since 2×426105921² = 363132511822516482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426105929) 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, 71017651 + ... + 71017656.

It is an arithmetic number, because the mean of its divisors is an integer number (142035308).

Almost surely, 2^426105921 is an apocalyptic number.

It is an amenable number.

426105921 is a deficient number, since it is larger than the sum of its proper divisors (142035311).

426105921 is a wasteful number, since it uses less digits than its factorization.

426105921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142035310.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 426105921 is about 20642.3332256797. Note that the first 3 decimals coincide. The cubic root of 426105921 is about 752.4988773470.

The spelling of 426105921 in words is "four hundred twenty-six million, one hundred five thousand, nine hundred twenty-one".