1221040292 has 12 divisors (see below), whose sum is σ = 2137643340. Its totient is φ = 610285056.

The previous prime is 1221040279. The next prime is 1221040313. The reversal of 1221040292 is 2920401221.

It can be written as a sum of positive squares in 2 ways, for example, as 741255076 + 479785216 = 27226^2 + 21904^2 .

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 3 ways as a sum of consecutive naturals, for example, 46817 + ... + 68072.

It is an arithmetic number, because the mean of its divisors is an integer number (178136945).

Almost surely, 2^1221040292 is an apocalyptic number.

It is an amenable number.

1221040292 is a deficient number, since it is larger than the sum of its proper divisors (916603048).

1221040292 is a wasteful number, since it uses less digits than its factorization.

1221040292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117550 (or 117548 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1221040292 is about 34943.3869566188. The cubic root of 1221040292 is about 1068.8333550481.

The spelling of 1221040292 in words is "one billion, two hundred twenty-one million, forty thousand, two hundred ninety-two".