64601421 has 4 divisors (see below), whose sum is σ = 86135232. Its totient is φ = 43067612.

The previous prime is 64601413. The next prime is 64601441. The reversal of 64601421 is 12410646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64601421 - 2³ = 64601413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64601391 and 64601400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64601441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10766901 + ... + 10766906.

It is an arithmetic number, because the mean of its divisors is an integer number (21533808).

Almost surely, 2^64601421 is an apocalyptic number.

It is an amenable number.

64601421 is a deficient number, since it is larger than the sum of its proper divisors (21533811).

64601421 is a wasteful number, since it uses less digits than its factorization.

64601421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21533810.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 64601421 is about 8037.5009175738. The cubic root of 64601421 is about 401.2490560046.

The spelling of 64601421 in words is "sixty-four million, six hundred one thousand, four hundred twenty-one".