1249649008 has 20 divisors (see below), whose sum is σ = 2421743560. Its totient is φ = 624682944.

The previous prime is 1249649003. The next prime is 1249649047. The reversal of 1249649008 is 8009469421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249649003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130066 + ... + 139342.

It is an arithmetic number, because the mean of its divisors is an integer number (121087178).

Almost surely, 2^1249649008 is an apocalyptic number.

It is an amenable number.

1249649008 is a deficient number, since it is larger than the sum of its proper divisors (1172094552).

1249649008 is an equidigital number, since it uses as much as digits as its factorization.

1249649008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17704 (or 17698 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1249649008 is about 35350.3749343624. The cubic root of 1249649008 is about 1077.1165103320.

It can be divided in two parts, 12496 and 49008, that added together give a square (61504 = 248²).

The spelling of 1249649008 in words is "one billion, two hundred forty-nine million, six hundred forty-nine thousand, eight".