64271421 has 8 divisors (see below), whose sum is σ = 95216960. Its totient is φ = 42847596.

The previous prime is 64271413. The next prime is 64271423. The reversal of 64271421 is 12417246.

64271421 is a `hidden beast` number, since 642 + 7 + 14 + 2 + 1 = 666.

It is not a de Polignac number, because 64271421 - 2³ = 64271413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2380423 = 64271421 / (6 + 4 + 2 + 7 + 1 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64271423) 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, 1190185 + ... + 1190238.

It is an arithmetic number, because the mean of its divisors is an integer number (11902120).

Almost surely, 2^64271421 is an apocalyptic number.

It is an amenable number.

64271421 is a deficient number, since it is larger than the sum of its proper divisors (30945539).

64271421 is a wasteful number, since it uses less digits than its factorization.

64271421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380432 (or 2380426 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 64271421 is about 8016.9458648540. The cubic root of 64271421 is about 400.5646629310.

Adding to 64271421 its reverse (12417246), we get a palindrome (76688667).

The spelling of 64271421 in words is "sixty-four million, two hundred seventy-one thousand, four hundred twenty-one".