1249116646 has 4 divisors (see below), whose sum is σ = 1873674972. Its totient is φ = 624558322.

The previous prime is 1249116613. The next prime is 1249116647. The reversal of 1249116646 is 6466119421.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1249116599 and 1249116608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249116647) 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 as a sum of consecutive naturals, namely, 312279160 + ... + 312279163.

It is an arithmetic number, because the mean of its divisors is an integer number (468418743).

Almost surely, 2^1249116646 is an apocalyptic number.

1249116646 is a deficient number, since it is larger than the sum of its proper divisors (624558326).

1249116646 is an equidigital number, since it uses as much as digits as its factorization.

1249116646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624558325.

The product of its digits is 62208, while the sum is 40.

The square root of 1249116646 is about 35342.8443394133. The cubic root of 1249116646 is about 1076.9635347519.

The spelling of 1249116646 in words is "one billion, two hundred forty-nine million, one hundred sixteen thousand, six hundred forty-six".