426140643 has 8 divisors (see below), whose sum is σ = 568288000. Its totient is φ = 284043528.

The previous prime is 426140599. The next prime is 426140647. The reversal of 426140643 is 346041624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 426140643 - 2⁹ = 426140131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 426140643.

It is not an unprimeable number, because it can be changed into a prime (426140647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17538 + ... + 34056.

It is an arithmetic number, because the mean of its divisors is an integer number (71036000).

Almost surely, 2^426140643 is an apocalyptic number.

426140643 is a deficient number, since it is larger than the sum of its proper divisors (142147357).

426140643 is a wasteful number, since it uses less digits than its factorization.

426140643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25121.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 426140643 is about 20643.1742471937. The cubic root of 426140643 is about 752.5193163623.

The spelling of 426140643 in words is "four hundred twenty-six million, one hundred forty thousand, six hundred forty-three".