1253865271 has 12 divisors (see below), whose sum is σ = 1331820552. Its totient is φ = 1180252944.

The previous prime is 1253865241. The next prime is 1253865281. The reversal of 1253865271 is 1725683521.

It is not a de Polignac number, because 1253865271 - 2⁷ = 1253865143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253865241) 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, 45616 + ... + 67738.

It is an arithmetic number, because the mean of its divisors is an integer number (110985046).

Almost surely, 2^1253865271 is an apocalyptic number.

1253865271 is a deficient number, since it is larger than the sum of its proper divisors (77955281).

1253865271 is a wasteful number, since it uses less digits than its factorization.

1253865271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22318 (or 22299 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 1253865271 is about 35409.9600536346. The cubic root of 1253865271 is about 1078.3265323749.

The spelling of 1253865271 in words is "one billion, two hundred fifty-three million, eight hundred sixty-five thousand, two hundred seventy-one".