1253139218 has 16 divisors (see below), whose sum is σ = 1894963200. Its totient is φ = 621504576.

The previous prime is 1253139197. The next prime is 1253139221. The reversal of 1253139218 is 8129313521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129455 + ... + 138797.

It is an arithmetic number, because the mean of its divisors is an integer number (118435200).

Almost surely, 2^1253139218 is an apocalyptic number.

1253139218 is a deficient number, since it is larger than the sum of its proper divisors (641823982).

1253139218 is a wasteful number, since it uses less digits than its factorization.

1253139218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881.

The product of its digits is 12960, while the sum is 35.

The square root of 1253139218 is about 35399.7064677096. The cubic root of 1253139218 is about 1078.1183565318.

The spelling of 1253139218 in words is "one billion, two hundred fifty-three million, one hundred thirty-nine thousand, two hundred eighteen".