321403145 has 32 divisors (see below), whose sum is σ = 465454080. Its totient is φ = 208128960.

The previous prime is 321403123. The next prime is 321403151. The reversal of 321403145 is 541304123.

It is not a de Polignac number, because 321403145 - 2¹⁸ = 321141001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321403145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294050 + ... + 295140.

It is an arithmetic number, because the mean of its divisors is an integer number (14545440).

Almost surely, 2^321403145 is an apocalyptic number.

321403145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321403145 is a deficient number, since it is larger than the sum of its proper divisors (144050935).

321403145 is a wasteful number, since it uses less digits than its factorization.

321403145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 321403145 is about 17927.7200167785. The cubic root of 321403145 is about 684.9886477597.

Adding to 321403145 its reverse (541304123), we get a palindrome (862707268).

The spelling of 321403145 in words is "three hundred twenty-one million, four hundred three thousand, one hundred forty-five".