64020401 has 4 divisors (see below), whose sum is σ = 64307712. Its totient is φ = 63733092.

The previous prime is 64020391. The next prime is 64020403. The reversal of 64020401 is 10402046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10402046 = 2 ⋅5201023.

It is a cyclic number.

It is not a de Polignac number, because 64020401 - 2⁶ = 64020337 is a prime.

It is a super-2 number, since 2×64020401² = 8197223488401602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64020401.

It is not an unprimeable number, because it can be changed into a prime (64020403) 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, 143321 + ... + 143766.

It is an arithmetic number, because the mean of its divisors is an integer number (16076928).

Almost surely, 2^64020401 is an apocalyptic number.

It is an amenable number.

64020401 is a deficient number, since it is larger than the sum of its proper divisors (287311).

64020401 is a wasteful number, since it uses less digits than its factorization.

64020401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287310.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 64020401 is about 8001.2749609047. The cubic root of 64020401 is about 400.0424975681.

Adding to 64020401 its reverse (10402046), we get a palindrome (74422447).

The spelling of 64020401 in words is "sixty-four million, twenty thousand, four hundred one".