321601247 has 4 divisors (see below), whose sum is σ = 350837736. Its totient is φ = 292364760.

The previous prime is 321601243. The next prime is 321601261. The reversal of 321601247 is 742106123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321601247 - 2² = 321601243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321601243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14618228 + ... + 14618249.

It is an arithmetic number, because the mean of its divisors is an integer number (87709434).

Almost surely, 2^321601247 is an apocalyptic number.

321601247 is a deficient number, since it is larger than the sum of its proper divisors (29236489).

321601247 is a wasteful number, since it uses less digits than its factorization.

321601247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29236488.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 321601247 is about 17933.2441850324. The cubic root of 321601247 is about 685.1293534466.

The spelling of 321601247 in words is "three hundred twenty-one million, six hundred one thousand, two hundred forty-seven".