1172242543 has 2 divisors, whose sum is σ = 1172242544. Its totient is φ = 1172242542.

The previous prime is 1172242529. The next prime is 1172242549. The reversal of 1172242543 is 3452422711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1172242543 - 2¹³ = 1172234351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1172242549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586121271 + 586121272.

It is an arithmetic number, because the mean of its divisors is an integer number (586121272).

Almost surely, 2^1172242543 is an apocalyptic number.

1172242543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172242543 is an equidigital number, since it uses as much as digits as its factorization.

1172242543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 31.

The square root of 1172242543 is about 34238.0277323329. The cubic root of 1172242543 is about 1054.4010415361.

The spelling of 1172242543 in words is "one billion, one hundred seventy-two million, two hundred forty-two thousand, five hundred forty-three".