321421607 has 12 divisors (see below), whose sum is σ = 351149184. Its totient is φ = 294053760.

The previous prime is 321421577. The next prime is 321421637. The reversal of 321421607 is 706124123.

It is an interprime number because it is at equal distance from previous prime (321421577) and next prime (321421637).

It is not a de Polignac number, because 321421607 - 2⁸ = 321421351 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 (321421637) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10682 + ... + 27512.

It is an arithmetic number, because the mean of its divisors is an integer number (29262432).

Almost surely, 2^321421607 is an apocalyptic number.

321421607 is a deficient number, since it is larger than the sum of its proper divisors (29727577).

321421607 is a wasteful number, since it uses less digits than its factorization.

321421607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16970 (or 16957 counting only the distinct ones).

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

The square root of 321421607 is about 17928.2349103307. The cubic root of 321421607 is about 685.0017631865.

The spelling of 321421607 in words is "three hundred twenty-one million, four hundred twenty-one thousand, six hundred seven".