1249609387 has 8 divisors (see below), whose sum is σ = 1359608096. Its totient is φ = 1141592832.

The previous prime is 1249609363. The next prime is 1249609421. The reversal of 1249609387 is 7839069421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249609387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1249609387.

It is not an unprimeable number, because it can be changed into a prime (1249609337) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 494223 + ... + 496744.

It is an arithmetic number, because the mean of its divisors is an integer number (169951012).

Almost surely, 2^1249609387 is an apocalyptic number.

1249609387 is a deficient number, since it is larger than the sum of its proper divisors (109998709).

1249609387 is an equidigital number, since it uses as much as digits as its factorization.

1249609387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991077.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 1249609387 is about 35349.8145256803. The cubic root of 1249609387 is about 1077.1051266331.

The spelling of 1249609387 in words is "one billion, two hundred forty-nine million, six hundred nine thousand, three hundred eighty-seven".