426821473 has 16 divisors (see below), whose sum is σ = 465131520. Its totient is φ = 389321856.

The previous prime is 426821467. The next prime is 426821489. The reversal of 426821473 is 374128624.

It is a 2-Lehmer number, since φ(426821473) divides (426821473-1)².

It is a cyclic number.

It is a Carmichael number.

It is a de Polignac number, because none of the positive numbers 2^k-426821473 is a prime.

It is a deceptive number, since it divides R_426821472.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426821413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691461 + ... + 692077.

It is an arithmetic number, because the mean of its divisors is an integer number (29070720).

It is a Poulet number, since it divides 2^426821472-1.

Almost surely, 2^426821473 is an apocalyptic number.

It is an amenable number.

426821473 is a deficient number, since it is larger than the sum of its proper divisors (38310047).

426821473 is a wasteful number, since it uses less digits than its factorization.

426821473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its digits is 64512, while the sum is 37.

The square root of 426821473 is about 20659.6581046251. The cubic root of 426821473 is about 752.9198610561.

The spelling of 426821473 in words is "four hundred twenty-six million, eight hundred twenty-one thousand, four hundred seventy-three".