1253383857 has 48 divisors (see below), whose sum is σ = 2049727680. Its totient is φ = 731068800.

The previous prime is 1253383853. The next prime is 1253383861. The reversal of 1253383857 is 7583833521.

It is an interprime number because it is at equal distance from previous prime (1253383853) and next prime (1253383861).

It is not a de Polignac number, because 1253383857 - 2² = 1253383853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253383853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1323058 + ... + 1324004.

It is an arithmetic number, because the mean of its divisors is an integer number (42702660).

Almost surely, 2^1253383857 is an apocalyptic number.

It is an amenable number.

1253383857 is a deficient number, since it is larger than the sum of its proper divisors (796343823).

1253383857 is a wasteful number, since it uses less digits than its factorization.

1253383857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454 (or 1451 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 1253383857 is about 35403.1616808443. The cubic root of 1253383857 is about 1078.1885090553.

The spelling of 1253383857 in words is "one billion, two hundred fifty-three million, three hundred eighty-three thousand, eight hundred fifty-seven".