426403865 has 4 divisors (see below), whose sum is σ = 511684644. Its totient is φ = 341123088.

The previous prime is 426403823. The next prime is 426403883. The reversal of 426403865 is 568304624.

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 239042521 + 187361344 = 15461^2 + 13688^2 .

It is a cyclic number.

It is not a de Polignac number, because 426403865 - 2⁶ = 426403801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42640382 + ... + 42640391.

It is an arithmetic number, because the mean of its divisors is an integer number (127921161).

Almost surely, 2^426403865 is an apocalyptic number.

It is an amenable number.

426403865 is a deficient number, since it is larger than the sum of its proper divisors (85280779).

426403865 is an equidigital number, since it uses as much as digits as its factorization.

426403865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85280778.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 426403865 is about 20649.5487844166. The cubic root of 426403865 is about 752.6742252114.

The spelling of 426403865 in words is "four hundred twenty-six million, four hundred three thousand, eight hundred sixty-five".