426240637 has 4 divisors (see below), whose sum is σ = 440938620. Its totient is φ = 411542656.

The previous prime is 426240593. The next prime is 426240653. The reversal of 426240637 is 736042624.

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 268763236 + 157477401 = 16394^2 + 12549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426240637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426240937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7348948 + ... + 7349005.

It is an arithmetic number, because the mean of its divisors is an integer number (110234655).

Almost surely, 2^426240637 is an apocalyptic number.

It is an amenable number.

426240637 is a deficient number, since it is larger than the sum of its proper divisors (14697983).

426240637 is a wasteful number, since it uses less digits than its factorization.

426240637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14697982.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 426240637 is about 20645.5960679269. The cubic root of 426240637 is about 752.5781713694.

The spelling of 426240637 in words is "four hundred twenty-six million, two hundred forty thousand, six hundred thirty-seven".