1253890025 has 12 divisors (see below), whose sum is σ = 1555298892. Its totient is φ = 1002805440.

The previous prime is 1253890021. The next prime is 1253890039. The reversal of 1253890025 is 5200983521.

It can be written as a sum of positive squares in 6 ways, for example, as 423701056 + 830188969 = 20584^2 + 28813^2 .

It is not a de Polignac number, because 1253890025 - 2² = 1253890021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253890021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113027 + ... + 123623.

It is an arithmetic number, because the mean of its divisors is an integer number (129608241).

Almost surely, 2^1253890025 is an apocalyptic number.

It is an amenable number.

1253890025 is a deficient number, since it is larger than the sum of its proper divisors (301408867).

1253890025 is a wasteful number, since it uses less digits than its factorization.

1253890025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340 (or 15335 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1253890025 is about 35410.3095863338. The cubic root of 1253890025 is about 1078.3336284907. Note that the first 3 decimals are identical.

The spelling of 1253890025 in words is "one billion, two hundred fifty-three million, eight hundred ninety thousand, twenty-five".