253265945 has 8 divisors (see below), whose sum is σ = 305676936. Its totient is φ = 201440896.

The previous prime is 253265941. The next prime is 253265989. The reversal of 253265945 is 549562352.

It can be written as a sum of positive squares in 4 ways, for example, as 9406489 + 243859456 = 3067^2 + 15616^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253265945 - 2² = 253265941 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 (253265941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145532 + ... + 147261.

It is an arithmetic number, because the mean of its divisors is an integer number (38209617).

Almost surely, 2^253265945 is an apocalyptic number.

It is an amenable number.

253265945 is a deficient number, since it is larger than the sum of its proper divisors (52410991).

253265945 is a wasteful number, since it uses less digits than its factorization.

253265945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292971.

The product of its digits is 324000, while the sum is 41.

The square root of 253265945 is about 15914.3314342765. The cubic root of 253265945 is about 632.6918871831.

The spelling of 253265945 in words is "two hundred fifty-three million, two hundred sixty-five thousand, nine hundred forty-five".