64401271 has 8 divisors (see below), whose sum is σ = 71305344. Its totient is φ = 57672120.

The previous prime is 64401269. The next prime is 64401289. The reversal of 64401271 is 17210446.

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

It is not a de Polignac number, because 64401271 - 2¹ = 64401269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42955 + ... + 44428.

It is an arithmetic number, because the mean of its divisors is an integer number (8913168).

Almost surely, 2^64401271 is an apocalyptic number.

64401271 is a deficient number, since it is larger than the sum of its proper divisors (6904073).

64401271 is a wasteful number, since it uses less digits than its factorization.

64401271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87461.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 64401271 is about 8025.0402491202. The cubic root of 64401271 is about 400.8342401489.

The spelling of 64401271 in words is "sixty-four million, four hundred one thousand, two hundred seventy-one".