1249856444 has 6 divisors (see below), whose sum is σ = 2187248784. Its totient is φ = 624928220.

The previous prime is 1249856431. The next prime is 1249856467. The reversal of 1249856444 is 4446589421.

It is a super-2 number, since 2×1249856444² = 3124282261216650272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 156232052 + ... + 156232059.

It is an arithmetic number, because the mean of its divisors is an integer number (364541464).

Almost surely, 2^1249856444 is an apocalyptic number.

It is an amenable number.

1249856444 is a deficient number, since it is larger than the sum of its proper divisors (937392340).

1249856444 is a wasteful number, since it uses less digits than its factorization.

1249856444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312464115 (or 312464113 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 1249856444 is about 35353.3088126133. The cubic root of 1249856444 is about 1077.1761058337.

The spelling of 1249856444 in words is "one billion, two hundred forty-nine million, eight hundred fifty-six thousand, four hundred forty-four".