321404641 has 8 divisors (see below), whose sum is σ = 323086464. Its totient is φ = 319727760.

The previous prime is 321404639. The next prime is 321404647. The reversal of 321404641 is 146404123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321404641 - 2¹ = 321404639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321404647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215400 + ... + 216886.

It is an arithmetic number, because the mean of its divisors is an integer number (40385808).

Almost surely, 2^321404641 is an apocalyptic number.

It is an amenable number.

321404641 is a deficient number, since it is larger than the sum of its proper divisors (1681823).

321404641 is a wasteful number, since it uses less digits than its factorization.

321404641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 321404641 is about 17927.7617398269. The cubic root of 321404641 is about 684.9897105386.

Adding to 321404641 its reverse (146404123), we get a palindrome (467808764).

The spelling of 321404641 in words is "three hundred twenty-one million, four hundred four thousand, six hundred forty-one".