11542891 has 2 divisors, whose sum is σ = 11542892. Its totient is φ = 11542890.

The previous prime is 11542889. The next prime is 11542897. The reversal of 11542891 is 19824511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11542891 - 2¹ = 11542889 is a prime.

Together with 11542889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11542897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771445 + 5771446.

It is an arithmetic number, because the mean of its divisors is an integer number (5771446).

Almost surely, 2^11542891 is an apocalyptic number.

11542891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11542891 is an equidigital number, since it uses as much as digits as its factorization.

11542891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 31.

The square root of 11542891 is about 3397.4830389569. The cubic root of 11542891 is about 225.9981400113.

The spelling of 11542891 in words is "eleven million, five hundred forty-two thousand, eight hundred ninety-one".