1253904165 has 16 divisors (see below), whose sum is σ = 2229163200. Its totient is φ = 668748816.

The previous prime is 1253904149. The next prime is 1253904203. The reversal of 1253904165 is 5614093521.

1253904165 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1253904165 - 2⁴ = 1253904149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4643955 + ... + 4644224.

It is an arithmetic number, because the mean of its divisors is an integer number (139322700).

Almost surely, 2^1253904165 is an apocalyptic number.

1253904165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253904165 is a deficient number, since it is larger than the sum of its proper divisors (975259035).

1253904165 is an equidigital number, since it uses as much as digits as its factorization.

1253904165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9288193 (or 9288187 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1253904165 is about 35410.5092451379. The cubic root of 1253904165 is about 1078.3376818978.

Adding to 1253904165 its reverse (5614093521), we get a palindrome (6867997686).

The spelling of 1253904165 in words is "one billion, two hundred fifty-three million, nine hundred four thousand, one hundred sixty-five".