1253724857 has 16 divisors (see below), whose sum is σ = 1655033472. Its totient is φ = 919461120.

The previous prime is 1253724851. The next prime is 1253724869. The reversal of 1253724857 is 7584273521.

It is a cyclic number.

It is not a de Polignac number, because 1253724857 - 2⁸ = 1253724601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253724851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477578 + ... + 480195.

It is an arithmetic number, because the mean of its divisors is an integer number (103439592).

Almost surely, 2^1253724857 is an apocalyptic number.

1253724857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1253724857 is a deficient number, since it is larger than the sum of its proper divisors (401308615).

1253724857 is a wasteful number, since it uses less digits than its factorization.

1253724857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957808.

The product of its digits is 470400, while the sum is 44.

The square root of 1253724857 is about 35407.9773073809. The cubic root of 1253724857 is about 1078.2862787694.

The spelling of 1253724857 in words is "one billion, two hundred fifty-three million, seven hundred twenty-four thousand, eight hundred fifty-seven".