321426534 has 64 divisors (see below), whose sum is σ = 795029760. Its totient is φ = 85173120.

The previous prime is 321426527. The next prime is 321426551. The reversal of 321426534 is 435624123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6444 + ... + 26160.

It is an arithmetic number, because the mean of its divisors is an integer number (12422340).

Almost surely, 2^321426534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321426534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397514880).

321426534 is an abundant number, since it is smaller than the sum of its proper divisors (473603226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321426534 is a wasteful number, since it uses less digits than its factorization.

321426534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19765.

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

The square root of 321426534 is about 17928.3723187578. The cubic root of 321426534 is about 685.0052632483.

The spelling of 321426534 in words is "three hundred twenty-one million, four hundred twenty-six thousand, five hundred thirty-four".