64925249 has 4 divisors (see below), whose sum is σ = 64945860. Its totient is φ = 64904640.

The previous prime is 64925239. The next prime is 64925279. The reversal of 64925249 is 94252946.

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 41692849 + 23232400 = 6457^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64925249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64925219) 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, 4484 + ... + 12245.

It is an arithmetic number, because the mean of its divisors is an integer number (16236465).

Almost surely, 2^64925249 is an apocalyptic number.

It is an amenable number.

64925249 is a deficient number, since it is larger than the sum of its proper divisors (20611).

64925249 is a wasteful number, since it uses less digits than its factorization.

64925249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20610.

The product of its digits is 155520, while the sum is 41.

The square root of 64925249 is about 8057.6205544813. The cubic root of 64925249 is about 401.9183868546.

The spelling of 64925249 in words is "sixty-four million, nine hundred twenty-five thousand, two hundred forty-nine".