64251001 has 4 divisors (see below), whose sum is σ = 64392052. Its totient is φ = 64109952.

The previous prime is 64250947. The next prime is 64251071. The reversal of 64251001 is 10015246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10015246 = 2 ⋅5007623.

It can be written as a sum of positive squares in 2 ways, for example, as 58125376 + 6125625 = 7624^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 64251001 - 2¹⁹ = 63726713 is a prime.

It is a super-2 number, since 2×64251001² = 8256382259004002, 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 64251001.

It is not an unprimeable number, because it can be changed into a prime (64251071) 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, 69840 + ... + 70753.

It is an arithmetic number, because the mean of its divisors is an integer number (16098013).

Almost surely, 2^64251001 is an apocalyptic number.

It is an amenable number.

64251001 is a deficient number, since it is larger than the sum of its proper divisors (141051).

64251001 is a wasteful number, since it uses less digits than its factorization.

64251001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141050.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 64251001 is about 8015.6722113619. The cubic root of 64251001 is about 400.5222366255.

Adding to 64251001 its reverse (10015246), we get a palindrome (74266247).

It can be divided in two parts, 64 and 251001, that multiplied together give a square (16064064 = 4008²).

The spelling of 64251001 in words is "sixty-four million, two hundred fifty-one thousand, one".