1249631418 has 24 divisors (see below), whose sum is σ = 2907306432. Its totient is φ = 357037464.

The previous prime is 1249631417. The next prime is 1249631429. The reversal of 1249631418 is 8141369421.

It is not an unprimeable number, because it can be changed into a prime (1249631413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2124930 + ... + 2125517.

It is an arithmetic number, because the mean of its divisors is an integer number (121137768).

Almost surely, 2^1249631418 is an apocalyptic number.

1249631418 is an abundant number, since it is smaller than the sum of its proper divisors (1657675014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1249631418 is a wasteful number, since it uses less digits than its factorization.

1249631418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250466 (or 4250459 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 1249631418 is about 35350.1261383888. The cubic root of 1249631418 is about 1077.1114564947. Note that the first 3 decimals are identical.

The spelling of 1249631418 in words is "one billion, two hundred forty-nine million, six hundred thirty-one thousand, four hundred eighteen".