64367421 has 8 divisors (see below), whose sum is σ = 90340320. Its totient is φ = 40653072.

The previous prime is 64367419. The next prime is 64367437. The reversal of 64367421 is 12476346.

It is a happy number.

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

It is not a de Polignac number, because 64367421 - 2¹ = 64367419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64367461) 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, 564570 + ... + 564683.

It is an arithmetic number, because the mean of its divisors is an integer number (11292540).

Almost surely, 2^64367421 is an apocalyptic number.

It is an amenable number.

64367421 is a deficient number, since it is larger than the sum of its proper divisors (25972899).

64367421 is a wasteful number, since it uses less digits than its factorization.

64367421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129275.

The product of its digits is 24192, while the sum is 33.

The square root of 64367421 is about 8022.9309482258. The cubic root of 64367421 is about 400.7640002467.

The spelling of 64367421 in words is "sixty-four million, three hundred sixty-seven thousand, four hundred twenty-one".