1265407253 has 8 divisors (see below), whose sum is σ = 1380731616. Its totient is φ = 1150130800.

The previous prime is 1265407217. The next prime is 1265407309. The reversal of 1265407253 is 3527045621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265407253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265407453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64538 + ... + 81828.

It is an arithmetic number, because the mean of its divisors is an integer number (172591452).

Almost surely, 2^1265407253 is an apocalyptic number.

It is an amenable number.

1265407253 is a deficient number, since it is larger than the sum of its proper divisors (115324363).

1265407253 is a wasteful number, since it uses less digits than its factorization.

1265407253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23955.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 1265407253 is about 35572.5632053694. The cubic root of 1265407253 is about 1081.6251404902.

The spelling of 1265407253 in words is "one billion, two hundred sixty-five million, four hundred seven thousand, two hundred fifty-three".