1249938136 has 32 divisors (see below), whose sum is σ = 2416790880. Its totient is φ = 605664000.

The previous prime is 1249938133. The next prime is 1249938139. The reversal of 1249938136 is 6318399421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1249938133) and next prime (1249938139).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249938133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36910 + ... + 62146.

It is an arithmetic number, because the mean of its divisors is an integer number (75524715).

Almost surely, 2^1249938136 is an apocalyptic number.

It is an amenable number.

1249938136 is a deficient number, since it is larger than the sum of its proper divisors (1166852744).

1249938136 is a wasteful number, since it uses less digits than its factorization.

1249938136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25435 (or 25431 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 1249938136 is about 35354.4641594241. The cubic root of 1249938136 is about 1077.1995737964.

The spelling of 1249938136 in words is "one billion, two hundred forty-nine million, nine hundred thirty-eight thousand, one hundred thirty-six".