1117721292 has 12 divisors (see below), whose sum is σ = 2608016376. Its totient is φ = 372573760.

The previous prime is 1117721281. The next prime is 1117721327. The reversal of 1117721292 is 2921277111.

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

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, 46571709 + ... + 46571732.

It is an arithmetic number, because the mean of its divisors is an integer number (217334698).

Almost surely, 2^1117721292 is an apocalyptic number.

1117721292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1117721292 is an abundant number, since it is smaller than the sum of its proper divisors (1490295084).

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

1117721292 is a wasteful number, since it uses less digits than its factorization.

1117721292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93143448 (or 93143446 counting only the distinct ones).

The product of its digits is 3528, while the sum is 33.

The square root of 1117721292 is about 33432.3390147922. The cubic root of 1117721292 is about 1037.7940458845.

The spelling of 1117721292 in words is "one billion, one hundred seventeen million, seven hundred twenty-one thousand, two hundred ninety-two".