1253379249 has 12 divisors (see below), whose sum is σ = 1819819716. Its totient is φ = 831255552.

The previous prime is 1253379241. The next prime is 1253379269. The reversal of 1253379249 is 9429733521.

1253379249 is a `hidden beast` number, since 1 + 2 + 533 + 79 + 2 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 155451024 + 1097928225 = 12468^2 + 33135^2 .

It is not a de Polignac number, because 1253379249 - 2³ = 1253379241 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1253379241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359052 + ... + 362525.

It is an arithmetic number, because the mean of its divisors is an integer number (151651643).

Almost surely, 2^1253379249 is an apocalyptic number.

It is an amenable number.

1253379249 is a deficient number, since it is larger than the sum of its proper divisors (566440467).

1253379249 is a wasteful number, since it uses less digits than its factorization.

1253379249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721776 (or 721773 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 1253379249 is about 35403.0966018511. The cubic root of 1253379249 is about 1078.1871877525.

The spelling of 1253379249 in words is "one billion, two hundred fifty-three million, three hundred seventy-nine thousand, two hundred forty-nine".