1321298950 has 24 divisors (see below), whose sum is σ = 2586966120. Its totient is φ = 500702400.

The previous prime is 1321298947. The next prime is 1321298977. The reversal of 1321298950 is 598921231.

It is a super-2 number, since 2×1321298950² = 3491661830542205000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 694471 + ... + 696370.

It is an arithmetic number, because the mean of its divisors is an integer number (107790255).

Almost surely, 2^1321298950 is an apocalyptic number.

1321298950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321298950 is a deficient number, since it is larger than the sum of its proper divisors (1265667170).

1321298950 is a wasteful number, since it uses less digits than its factorization.

1321298950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390872 (or 1390867 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1321298950 is about 36349.6760645814. The cubic root of 1321298950 is about 1097.3210152234.

The spelling of 1321298950 in words is "one billion, three hundred twenty-one million, two hundred ninety-eight thousand, nine hundred fifty".