1253318025 has 24 divisors (see below), whose sum is σ = 2095446240. Its totient is φ = 660922240.

The previous prime is 1253318023. The next prime is 1253318039. The reversal of 1253318025 is 5208133521.

It is not a de Polignac number, because 1253318025 - 2¹ = 1253318023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1253317983 and 1253318001.

It is not an unprimeable number, because it can be changed into a prime (1253318021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87207 + ... + 100556.

It is an arithmetic number, because the mean of its divisors is an integer number (87310260).

Almost surely, 2^1253318025 is an apocalyptic number.

1253318025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253318025 is a deficient number, since it is larger than the sum of its proper divisors (842128215).

1253318025 is a wasteful number, since it uses less digits than its factorization.

1253318025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187865 (or 187860 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1253318025 is about 35402.2319211656. The cubic root of 1253318025 is about 1078.1696320107.

The spelling of 1253318025 in words is "one billion, two hundred fifty-three million, three hundred eighteen thousand, twenty-five".