1249313121 has 12 divisors (see below), whose sum is σ = 2062358272. Its totient is φ = 713893176.

The previous prime is 1249313111. The next prime is 1249313129. The reversal of 1249313121 is 1213139421.

It is not a de Polignac number, because 1249313121 - 2⁷ = 1249312993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249313129) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9915121 + ... + 9915246.

Almost surely, 2^1249313121 is an apocalyptic number.

It is an amenable number.

1249313121 is a deficient number, since it is larger than the sum of its proper divisors (813045151).

1249313121 is a wasteful number, since it uses less digits than its factorization.

1249313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19830380 (or 19830377 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1249313121 is about 35345.6237885258. The cubic root of 1249313121 is about 1077.0199974044.

The spelling of 1249313121 in words is "one billion, two hundred forty-nine million, three hundred thirteen thousand, one hundred twenty-one".