1299940002 has 20 divisors (see below), whose sum is σ = 2912828886. Its totient is φ = 433313280.

The previous prime is 1299939997. The next prime is 1299940049. The reversal of 1299940002 is 2000499921.

It can be written as a sum of positive squares in only one way, i.e., 1218777921 + 81162081 = 34911^2 + 9009^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4011999 + ... + 4012322.

Almost surely, 2^1299940002 is an apocalyptic number.

1299940002 is an abundant number, since it is smaller than the sum of its proper divisors (1612888884).

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

1299940002 is an equidigital number, since it uses as much as digits as its factorization.

1299940002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024335 (or 8024326 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1299940002 is about 36054.6807224804. The cubic root of 1299940002 is about 1091.3760927027.

The spelling of 1299940002 in words is "one billion, two hundred ninety-nine million, nine hundred forty thousand, two".