12542191 has 2 divisors, whose sum is σ = 12542192. Its totient is φ = 12542190.

The previous prime is 12542183. The next prime is 12542227. The reversal of 12542191 is 19124521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12542191 - 2³ = 12542183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12542591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271095 + 6271096.

It is an arithmetic number, because the mean of its divisors is an integer number (6271096).

Almost surely, 2^12542191 is an apocalyptic number.

12542191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12542191 is an equidigital number, since it uses as much as digits as its factorization.

12542191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 12542191 is about 3541.4955880249. The cubic root of 12542191 is about 232.3402594886.

The spelling of 12542191 in words is "twelve million, five hundred forty-two thousand, one hundred ninety-one".