426874781 has 4 divisors (see below), whose sum is σ = 428084412. Its totient is φ = 425665152.

The previous prime is 426874759. The next prime is 426874801. The reversal of 426874781 is 187478624.

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 53071225 + 373803556 = 7285^2 + 19334^2 .

It is a cyclic number.

It is not a de Polignac number, because 426874781 - 2²² = 422680477 is a prime.

It is a super-3 number, since 3×426874781³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426874711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604286 + ... + 604991.

It is an arithmetic number, because the mean of its divisors is an integer number (107021103).

Almost surely, 2^426874781 is an apocalyptic number.

It is an amenable number.

426874781 is a deficient number, since it is larger than the sum of its proper divisors (1209631).

426874781 is a wasteful number, since it uses less digits than its factorization.

426874781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209630.

The product of its digits is 602112, while the sum is 47.

The square root of 426874781 is about 20660.9482115415. The cubic root of 426874781 is about 752.9512051376.

The spelling of 426874781 in words is "four hundred twenty-six million, eight hundred seventy-four thousand, seven hundred eighty-one".