64291321 has 8 divisors (see below), whose sum is σ = 67392864. Its totient is φ = 61262880.

The previous prime is 64291313. The next prime is 64291327. The reversal of 64291321 is 12319246.

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 64291321 - 2³ = 64291313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64291321.

It is not an unprimeable number, because it can be changed into a prime (64291327) 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, 16471 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (8424108).

Almost surely, 2^64291321 is an apocalyptic number.

It is an amenable number.

64291321 is a deficient number, since it is larger than the sum of its proper divisors (3101543).

64291321 is a wasteful number, since it uses less digits than its factorization.

64291321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36551.

The product of its digits is 2592, while the sum is 28.

The square root of 64291321 is about 8018.1868898149. The cubic root of 64291321 is about 400.6060001958.

It can be divided in two parts, 6429 and 1321, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 64291321 in words is "sixty-four million, two hundred ninety-one thousand, three hundred twenty-one".