131242187 has 2 divisors, whose sum is σ = 131242188.
Its totient is φ = 131242186.
The previous prime is 131242183. The next prime is 131242201. The reversal of 131242187 is 781242131.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 131242187 - 22 = 131242183 is a prime.
It is not a weakly prime, because it can be changed into another prime (131242183) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65621093 + 65621094.
It is an arithmetic number, because the mean of its divisors is an integer number (65621094).
Almost surely, 2131242187 is an apocalyptic number.
131242187 is a deficient number, since it is larger than the sum of its proper divisors (1).
131242187 is an equidigital number, since it uses as much as digits as its factorization.
131242187 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2688, while the sum is 29.
The square root of 131242187 is about 11456.0982450396.
The cubic root of 131242187 is about 508.1880942648.
The spelling of 131242187 in words is "one hundred thirty-one million, two hundred forty-two thousand, one hundred eighty-seven".