1177157243 has 4 divisors (see below), whose sum is σ = 1177622688. Its totient is φ = 1176691800.

The previous prime is 1177157239. The next prime is 1177157249. The reversal of 1177157243 is 3427517711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1177157243 - 2² = 1177157239 is a prime.

It is a super-2 number, since 2×1177157243² = 2771398349494722098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1177157197 and 1177157206.

It is not an unprimeable number, because it can be changed into a prime (1177157249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228908 + ... + 233993.

It is an arithmetic number, because the mean of its divisors is an integer number (294405672).

Almost surely, 2^1177157243 is an apocalyptic number.

1177157243 is a deficient number, since it is larger than the sum of its proper divisors (465445).

1177157243 is an equidigital number, since it uses as much as digits as its factorization.

1177157243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465444.

The product of its digits is 41160, while the sum is 38.

The square root of 1177157243 is about 34309.7251956351. The cubic root of 1177157243 is about 1055.8725343904.

The spelling of 1177157243 in words is "one billion, one hundred seventy-seven million, one hundred fifty-seven thousand, two hundred forty-three".