321321004 has 6 divisors (see below), whose sum is σ = 562311764. Its totient is φ = 160660500.

The previous prime is 321321001. The next prime is 321321023. The reversal of 321321004 is 400123123.

It is a happy number.

It is a super-2 number, since 2×321321004² = 206494375223136032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321321001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40165122 + ... + 40165129.

Almost surely, 2^321321004 is an apocalyptic number.

It is an amenable number.

321321004 is a deficient number, since it is larger than the sum of its proper divisors (240990760).

321321004 is a wasteful number, since it uses less digits than its factorization.

321321004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80330255 (or 80330253 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 321321004 is about 17925.4289767358. The cubic root of 321321004 is about 684.9302886062.

Adding to 321321004 its reverse (400123123), we get a palindrome (721444127).

It can be divided in two parts, 32132 and 1004, that multiplied together give a triangular number (32260528 = T₈₀₃₂).

The spelling of 321321004 in words is "three hundred twenty-one million, three hundred twenty-one thousand, four".