1249664412 has 12 divisors (see below), whose sum is σ = 2915883656. Its totient is φ = 416554800.

The previous prime is 1249664393. The next prime is 1249664417. The reversal of 1249664412 is 2144669421.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1249664412² = 3123322285238611488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249664417) 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 3 ways as a sum of consecutive naturals, for example, 52069339 + ... + 52069362.

Almost surely, 2^1249664412 is an apocalyptic number.

1249664412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1249664412 is an abundant number, since it is smaller than the sum of its proper divisors (1666219244).

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

1249664412 is a wasteful number, since it uses less digits than its factorization.

1249664412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104138708 (or 104138706 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 1249664412 is about 35350.5928097394. The cubic root of 1249664412 is about 1077.1209360639.

The spelling of 1249664412 in words is "one billion, two hundred forty-nine million, six hundred sixty-four thousand, four hundred twelve".