1321706292 has 12 divisors (see below), whose sum is σ = 3083981376. Its totient is φ = 440568760.

The previous prime is 1321706273. The next prime is 1321706357. The reversal of 1321706292 is 2926071231.

It is a tau number, because it is divible by the number of its divisors (12).

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, 55071084 + ... + 55071107.

It is an arithmetic number, because the mean of its divisors is an integer number (256998448).

Almost surely, 2^1321706292 is an apocalyptic number.

1321706292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321706292 is an abundant number, since it is smaller than the sum of its proper divisors (1762275084).

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

1321706292 is a wasteful number, since it uses less digits than its factorization.

1321706292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110142198 (or 110142196 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1321706292 is about 36355.2787363816. The cubic root of 1321706292 is about 1097.4337676557.

The spelling of 1321706292 in words is "one billion, three hundred twenty-one million, seven hundred six thousand, two hundred ninety-two".