1121957243 has 8 divisors (see below), whose sum is σ = 1233592320. Its totient is φ = 1011928680.

The previous prime is 1121957237. The next prime is 1121957281. The reversal of 1121957243 is 3427591211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121957243 - 2²⁸ = 853521787 is a prime.

It is a super-2 number, since 2×1121957243² = 2517576110240322098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121957203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400163 + ... + 402956.

It is an arithmetic number, because the mean of its divisors is an integer number (154199040).

Almost surely, 2^1121957243 is an apocalyptic number.

1121957243 is a deficient number, since it is larger than the sum of its proper divisors (111635077).

1121957243 is a wasteful number, since it uses less digits than its factorization.

1121957243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803257.

The product of its digits is 15120, while the sum is 35.

The square root of 1121957243 is about 33495.6302075360. The cubic root of 1121957243 is about 1039.1034071805.

The spelling of 1121957243 in words is "one billion, one hundred twenty-one million, nine hundred fifty-seven thousand, two hundred forty-three".