426875021 has 2 divisors, whose sum is σ = 426875022. Its totient is φ = 426875020.

The previous prime is 426875003. The next prime is 426875063. The reversal of 426875021 is 120578624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213568996 + 213306025 = 14614^2 + 14605^2 .

It is a cyclic number.

It is not a de Polignac number, because 426875021 - 2²² = 422680717 is a prime.

It is a super-3 number, since 3×426875021³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426875521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213437510 + 213437511.

It is an arithmetic number, because the mean of its divisors is an integer number (213437511).

Almost surely, 2^426875021 is an apocalyptic number.

It is an amenable number.

426875021 is a deficient number, since it is larger than the sum of its proper divisors (1).

426875021 is an equidigital number, since it uses as much as digits as its factorization.

426875021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 426875021 is about 20660.9540195994. The cubic root of 426875021 is about 752.9513462471.

The spelling of 426875021 in words is "four hundred twenty-six million, eight hundred seventy-five thousand, twenty-one".