1299890132 has 12 divisors (see below), whose sum is σ = 2275060116. Its totient is φ = 649872960.

The previous prime is 1299890101. The next prime is 1299890153. The reversal of 1299890132 is 2310989921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 605356816 + 694533316 = 24604^2 + 26354^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63032 + ... + 81072.

It is an arithmetic number, because the mean of its divisors is an integer number (189588343).

Almost surely, 2^1299890132 is an apocalyptic number.

It is an amenable number.

1299890132 is a deficient number, since it is larger than the sum of its proper divisors (975169984).

1299890132 is a wasteful number, since it uses less digits than its factorization.

1299890132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36058 (or 36056 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1299890132 is about 36053.9891274183. The cubic root of 1299890132 is about 1091.3621362582.

The spelling of 1299890132 in words is "one billion, two hundred ninety-nine million, eight hundred ninety thousand, one hundred thirty-two".