1299696156 has 144 divisors (see below), whose sum is σ = 3702386688. Its totient is φ = 381024000.

The previous prime is 1299696143. The next prime is 1299696169. The reversal of 1299696156 is 6516969921.

1299696156 is a `hidden beast` number, since 12 + 9 + 9 + 6 + 9 + 615 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1299696143) and next prime (1299696169).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2162256 + ... + 2162856.

Almost surely, 2^1299696156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299696156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851193344).

1299696156 is an abundant number, since it is smaller than the sum of its proper divisors (2402690532).

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

1299696156 is a wasteful number, since it uses less digits than its factorization.

1299696156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 787 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 1299696156 is about 36051.2989502459. The cubic root of 1299696156 is about 1091.3078474154.

The spelling of 1299696156 in words is "one billion, two hundred ninety-nine million, six hundred ninety-six thousand, one hundred fifty-six".