1249309868 has 12 divisors (see below), whose sum is σ = 2188831680. Its totient is φ = 623929392.

The previous prime is 1249309819. The next prime is 1249309877. The reversal of 1249309868 is 8689039421.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177503 + ... + 184406.

It is an arithmetic number, because the mean of its divisors is an integer number (182402640).

Almost surely, 2^1249309868 is an apocalyptic number.

It is an amenable number.

1249309868 is a deficient number, since it is larger than the sum of its proper divisors (939521812).

1249309868 is a wasteful number, since it uses less digits than its factorization.

1249309868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362776 (or 362774 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 1249309868 is about 35345.5777714837. The cubic root of 1249309868 is about 1077.0190626110.

The spelling of 1249309868 in words is "one billion, two hundred forty-nine million, three hundred nine thousand, eight hundred sixty-eight".