426124921 has 4 divisors (see below), whose sum is σ = 429896052. Its totient is φ = 422353792.

The previous prime is 426124879. The next prime is 426124939. The reversal of 426124921 is 129421624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163328400 + 262796521 = 12780^2 + 16211^2 .

It is a cyclic number.

It is not a de Polignac number, because 426124921 - 2⁷ = 426124793 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426124981) 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, 1885396 + ... + 1885621.

It is an arithmetic number, because the mean of its divisors is an integer number (107474013).

Almost surely, 2^426124921 is an apocalyptic number.

It is an amenable number.

426124921 is a deficient number, since it is larger than the sum of its proper divisors (3771131).

426124921 is a wasteful number, since it uses less digits than its factorization.

426124921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771130.

The product of its digits is 6912, while the sum is 31.

The square root of 426124921 is about 20642.7934398424. The cubic root of 426124921 is about 752.5100617853.

The spelling of 426124921 in words is "four hundred twenty-six million, one hundred twenty-four thousand, nine hundred twenty-one".