1253874613 has 4 divisors (see below), whose sum is σ = 1255862368. Its totient is φ = 1251886860.

The previous prime is 1253874599. The next prime is 1253874623. The reversal of 1253874613 is 3164783521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3164783521 = 31 ⋅102089791.

It is a cyclic number.

It is not a de Polignac number, because 1253874613 - 2¹⁷ = 1253743541 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 (1253874623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992931 + ... + 994192.

It is an arithmetic number, because the mean of its divisors is an integer number (313965592).

Almost surely, 2^1253874613 is an apocalyptic number.

It is an amenable number.

1253874613 is a deficient number, since it is larger than the sum of its proper divisors (1987755).

1253874613 is an equidigital number, since it uses as much as digits as its factorization.

1253874613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987754.

The product of its digits is 120960, while the sum is 40.

The square root of 1253874613 is about 35410.0919654270. The cubic root of 1253874613 is about 1078.3292104142.

The spelling of 1253874613 in words is "one billion, two hundred fifty-three million, eight hundred seventy-four thousand, six hundred thirteen".