64405001 has 4 divisors (see below), whose sum is σ = 64558404. Its totient is φ = 64251600.

The previous prime is 64404997. The next prime is 64405021. The reversal of 64405001 is 10050446.

It is a happy number.

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 32775625 + 31629376 = 5725^2 + 5624^2 .

It is a cyclic number.

It is not a de Polignac number, because 64405001 - 2² = 64404997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64405021) 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, 76070 + ... + 76911.

It is an arithmetic number, because the mean of its divisors is an integer number (16139601).

Almost surely, 2^64405001 is an apocalyptic number.

It is an amenable number.

64405001 is a deficient number, since it is larger than the sum of its proper divisors (153403).

64405001 is a wasteful number, since it uses less digits than its factorization.

64405001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153402.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 64405001 is about 8025.2726433437. The cubic root of 64405001 is about 400.8419785202.

Adding to 64405001 its reverse (10050446), we get a palindrome (74455447).

The spelling of 64405001 in words is "sixty-four million, four hundred five thousand, one".