1266290944 has 36 divisors (see below), whose sum is σ = 2637544896. Its totient is φ = 605614592.

The previous prime is 1266290941. The next prime is 1266290947. The reversal of 1266290944 is 4490926621.

It is an interprime number because it is at equal distance from previous prime (1266290941) and next prime (1266290947).

It is a super-2 number, since 2×1266290944² = 3206985509712822272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1266290944.

It is not an unprimeable number, because it can be changed into a prime (1266290941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101644 + ... + 113419.

It is an arithmetic number, because the mean of its divisors is an integer number (73265136).

Almost surely, 2^1266290944 is an apocalyptic number.

It is an amenable number.

1266290944 is an abundant number, since it is smaller than the sum of its proper divisors (1371253952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266290944 is an equidigital number, since it uses as much as digits as its factorization.

1266290944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215102 (or 215088 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 1266290944 is about 35584.9820008385. The cubic root of 1266290944 is about 1081.8768644545.

The spelling of 1266290944 in words is "one billion, two hundred sixty-six million, two hundred ninety thousand, nine hundred forty-four".