1249428844 has 12 divisors (see below), whose sum is σ = 2187401944. Its totient is φ = 624456864.

The previous prime is 1249428833. The next prime is 1249428853. The reversal of 1249428844 is 4488249421.

It is a super-2 number, since 2×1249428844² = 3122144872438352672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1249428794 and 1249428803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53262 + ... + 73045.

Almost surely, 2^1249428844 is an apocalyptic number.

It is an amenable number.

1249428844 is a deficient number, since it is larger than the sum of its proper divisors (937973100).

1249428844 is a wasteful number, since it uses less digits than its factorization.

1249428844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128784 (or 128782 counting only the distinct ones).

The product of its digits is 589824, while the sum is 46.

The square root of 1249428844 is about 35347.2607708150. The cubic root of 1249428844 is about 1077.0532509139.

The spelling of 1249428844 in words is "one billion, two hundred forty-nine million, four hundred twenty-eight thousand, eight hundred forty-four".