64460251 has 4 divisors (see below), whose sum is σ = 64476904. Its totient is φ = 64443600.

The previous prime is 64460213. The next prime is 64460257. The reversal of 64460251 is 15206446.

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

It is a cyclic number.

It is not a de Polignac number, because 64460251 - 2²¹ = 62363099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64460257) 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, 856 + ... + 11386.

It is an arithmetic number, because the mean of its divisors is an integer number (16119226).

Almost surely, 2^64460251 is an apocalyptic number.

64460251 is a deficient number, since it is larger than the sum of its proper divisors (16653).

64460251 is a wasteful number, since it uses less digits than its factorization.

64460251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16652.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 64460251 is about 8028.7141560775. The cubic root of 64460251 is about 400.9565668760.

Adding to 64460251 its reverse (15206446), we get a palindrome (79666697).

The spelling of 64460251 in words is "sixty-four million, four hundred sixty thousand, two hundred fifty-one".