64012281 has 8 divisors (see below), whose sum is σ = 85456224. Its totient is φ = 42621600.

The previous prime is 64012253. The next prime is 64012297. The reversal of 64012281 is 18221046.

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

It is not a de Polignac number, because 64012281 - 2⁶ = 64012217 is a prime.

It is a super-2 number, since 2×64012281² = 8195144237645922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64012231) 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, 10420 + ... + 15381.

It is an arithmetic number, because the mean of its divisors is an integer number (10682028).

Almost surely, 2^64012281 is an apocalyptic number.

It is an amenable number.

64012281 is a deficient number, since it is larger than the sum of its proper divisors (21443943).

64012281 is a wasteful number, since it uses less digits than its factorization.

64012281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26631.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 64012281 is about 8000.7675256815. The cubic root of 64012281 is about 400.0255837803.

It can be divided in two parts, 640 and 12281, that added together give a palindrome (12921).

The spelling of 64012281 in words is "sixty-four million, twelve thousand, two hundred eighty-one".