1226288749 has 24 divisors (see below), whose sum is σ = 1464270720. Its totient is φ = 1023430464.

The previous prime is 1226288737. The next prime is 1226288753. The reversal of 1226288749 is 9478826221.

It is not a de Polignac number, because 1226288749 - 2⁵ = 1226288717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226280749) 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 23 ways as a sum of consecutive naturals, for example, 861052 + ... + 862474.

It is an arithmetic number, because the mean of its divisors is an integer number (61011280).

Almost surely, 2^1226288749 is an apocalyptic number.

It is an amenable number.

1226288749 is a deficient number, since it is larger than the sum of its proper divisors (237981971).

1226288749 is a wasteful number, since it uses less digits than its factorization.

1226288749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 1882 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 1226288749 is about 35018.4058603472. The cubic root of 1226288749 is about 1070.3625722683.

The spelling of 1226288749 in words is "one billion, two hundred twenty-six million, two hundred eighty-eight thousand, seven hundred forty-nine".