9640251 has 6 divisors (see below), whose sum is σ = 13924820. Its totient is φ = 6426828.

The previous prime is 9640247. The next prime is 9640259. The reversal of 9640251 is 1520469.

9640251 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9640251 - 2² = 9640247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9640259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 535561 + ... + 535578.

Almost surely, 2^9640251 is an apocalyptic number.

9640251 is a deficient number, since it is larger than the sum of its proper divisors (4284569).

9640251 is a wasteful number, since it uses less digits than its factorization.

9640251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071145 (or 1071142 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 9640251 is about 3104.8753598172. The cubic root of 9640251 is about 212.8283348720.

The spelling of 9640251 in words is "nine million, six hundred forty thousand, two hundred fifty-one".