1253401265 has 4 divisors (see below), whose sum is σ = 1504081524. Its totient is φ = 1002721008.

The previous prime is 1253401241. The next prime is 1253401267. The reversal of 1253401265 is 5621043521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 964537249 + 288864016 = 31057^2 + 16996^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253401265 - 2²⁸ = 984965809 is a prime.

It is a super-2 number, since 2×1253401265² = 3142029462207200450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253401267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125340122 + ... + 125340131.

It is an arithmetic number, because the mean of its divisors is an integer number (376020381).

Almost surely, 2^1253401265 is an apocalyptic number.

It is an amenable number.

1253401265 is a deficient number, since it is larger than the sum of its proper divisors (250680259).

1253401265 is an equidigital number, since it uses as much as digits as its factorization.

1253401265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250680258.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1253401265 is about 35403.4075337389. The cubic root of 1253401265 is about 1078.1935006143.

Adding to 1253401265 its reverse (5621043521), we get a palindrome (6874444786).

The spelling of 1253401265 in words is "one billion, two hundred fifty-three million, four hundred one thousand, two hundred sixty-five".