1226787164 has 12 divisors (see below), whose sum is σ = 2147968704. Its totient is φ = 613081824.

The previous prime is 1226787157. The next prime is 1226787169. The reversal of 1226787164 is 4617876221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226787169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68972 + ... + 84915.

It is an arithmetic number, because the mean of its divisors is an integer number (178997392).

Almost surely, 2^1226787164 is an apocalyptic number.

It is an amenable number.

1226787164 is a deficient number, since it is larger than the sum of its proper divisors (921181540).

1226787164 is a wasteful number, since it uses less digits than its factorization.

1226787164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155884 (or 155882 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 1226787164 is about 35025.5216092494. The cubic root of 1226787164 is about 1070.5075659879.

The spelling of 1226787164 in words is "one billion, two hundred twenty-six million, seven hundred eighty-seven thousand, one hundred sixty-four".