405260643 has 4 divisors (see below), whose sum is σ = 540347528. Its totient is φ = 270173760.

The previous prime is 405260641. The next prime is 405260651. The reversal of 405260643 is 346062504.

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

It is not a de Polignac number, because 405260643 - 2¹ = 405260641 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 405260643.

It is not an unprimeable number, because it can be changed into a prime (405260641) 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, 67543438 + ... + 67543443.

It is an arithmetic number, because the mean of its divisors is an integer number (135086882).

Almost surely, 2^405260643 is an apocalyptic number.

405260643 is a deficient number, since it is larger than the sum of its proper divisors (135086885).

405260643 is a wasteful number, since it uses less digits than its factorization.

405260643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135086884.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 405260643 is about 20131.0864833471. The cubic root of 405260643 is about 740.0223045383.

The spelling of 405260643 in words is "four hundred five million, two hundred sixty thousand, six hundred forty-three".