64261421 has 8 divisors (see below), whose sum is σ = 73554624. Its totient is φ = 54996480.

The previous prime is 64261409. The next prime is 64261427. The reversal of 64261421 is 12416246.

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

It is a de Polignac number, because none of the positive numbers 2^k-64261421 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 (64261427) 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, 1940 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (9194328).

Almost surely, 2^64261421 is an apocalyptic number.

It is an amenable number.

64261421 is a deficient number, since it is larger than the sum of its proper divisors (9293203).

64261421 is a wasteful number, since it uses less digits than its factorization.

64261421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14131.

The product of its digits is 2304, while the sum is 26.

The square root of 64261421 is about 8016.3221616899. The cubic root of 64261421 is about 400.5438872149.

Adding to 64261421 its reverse (12416246), we get a palindrome (76677667).

The spelling of 64261421 in words is "sixty-four million, two hundred sixty-one thousand, four hundred twenty-one".