1253764139 has 4 divisors (see below), whose sum is σ = 1253888256. Its totient is φ = 1253640024.

The previous prime is 1253764121. The next prime is 1253764147. The reversal of 1253764139 is 9314673521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1253764139 - 2⁸ = 1253763883 is a prime.

It is a super-2 number, since 2×1253764139² = 3143849032484822642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1253764096 and 1253764105.

It is not an unprimeable number, because it can be changed into a prime (1253764199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45419 + ... + 67604.

It is an arithmetic number, because the mean of its divisors is an integer number (313472064).

Almost surely, 2^1253764139 is an apocalyptic number.

1253764139 is a deficient number, since it is larger than the sum of its proper divisors (124117).

1253764139 is a wasteful number, since it uses less digits than its factorization.

1253764139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124116.

The product of its digits is 136080, while the sum is 41.

The square root of 1253764139 is about 35408.5320085428. The cubic root of 1253764139 is about 1078.2975403576.

The spelling of 1253764139 in words is "one billion, two hundred fifty-three million, seven hundred sixty-four thousand, one hundred thirty-nine".