1299122740 has 48 divisors (see below), whose sum is σ = 2757162240. Its totient is φ = 514156160.

The previous prime is 1299122729. The next prime is 1299122749. The reversal of 1299122740 is 472219921.

It is a self number, because there is not a number n which added to its sum of digits gives 1299122740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299122749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826155 + ... + 827725.

It is an arithmetic number, because the mean of its divisors is an integer number (57440880).

Almost surely, 2^1299122740 is an apocalyptic number.

1299122740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299122740 is an abundant number, since it is smaller than the sum of its proper divisors (1458039500).

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

1299122740 is a wasteful number, since it uses less digits than its factorization.

1299122740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1299122740 is about 36043.3452942426. The cubic root of 1299122740 is about 1091.1473315828.

The spelling of 1299122740 in words is "one billion, two hundred ninety-nine million, one hundred twenty-two thousand, seven hundred forty".