321601104 has 200 divisors, whose sum is σ = 1075966848. Its totient is φ = 91653120.

The previous prime is 321601081. The next prime is 321601109. The reversal of 321601104 is 401106123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321601109) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 241689 + ... + 243015.

Almost surely, 2^321601104 is an apocalyptic number.

321601104 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321601104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537983424).

321601104 is an abundant number, since it is smaller than the sum of its proper divisors (754365744).

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

321601104 is a wasteful number, since it uses less digits than its factorization.

321601104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 321601104 is about 17933.2401980233. The cubic root of 321601104 is about 685.1292518990.

Adding to 321601104 its reverse (401106123), we get a palindrome (722707227).

The spelling of 321601104 in words is "three hundred twenty-one million, six hundred one thousand, one hundred four".