11542543 has 2 divisors, whose sum is σ = 11542544. Its totient is φ = 11542542.

The previous prime is 11542523. The next prime is 11542549. The reversal of 11542543 is 34524511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11542543 - 2⁵ = 11542511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11542549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771271 + 5771272.

It is an arithmetic number, because the mean of its divisors is an integer number (5771272).

Almost surely, 2^11542543 is an apocalyptic number.

11542543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11542543 is an equidigital number, since it uses as much as digits as its factorization.

11542543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 11542543 is about 3397.4318241872. The cubic root of 11542543 is about 225.9958688257.

The spelling of 11542543 in words is "eleven million, five hundred forty-two thousand, five hundred forty-three".