64172401 has 4 divisors (see below), whose sum is σ = 64191204. Its totient is φ = 64153600.

The previous prime is 64172377. The next prime is 64172413. The reversal of 64172401 is 10427146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20295025 + 43877376 = 4505^2 + 6624^2 .

It is a cyclic number.

It is not a de Polignac number, because 64172401 - 2¹³ = 64164209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64172491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2680 + ... + 11641.

It is an arithmetic number, because the mean of its divisors is an integer number (16047801).

Almost surely, 2^64172401 is an apocalyptic number.

It is an amenable number.

64172401 is a deficient number, since it is larger than the sum of its proper divisors (18803).

64172401 is a wasteful number, since it uses less digits than its factorization.

64172401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18802.

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

The square root of 64172401 is about 8010.7678158838. The cubic root of 64172401 is about 400.3588467263.

Adding to 64172401 its reverse (10427146), we get a palindrome (74599547).

The spelling of 64172401 in words is "sixty-four million, one hundred seventy-two thousand, four hundred one".