126087191 has 4 divisors (see below), whose sum is σ = 126173472. Its totient is φ = 126000912.

The previous prime is 126087187. The next prime is 126087193. The reversal of 126087191 is 191780621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126087191 - 2² = 126087187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126087193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40910 + ... + 43883.

It is an arithmetic number, because the mean of its divisors is an integer number (31543368).

Almost surely, 2^126087191 is an apocalyptic number.

126087191 is a deficient number, since it is larger than the sum of its proper divisors (86281).

126087191 is an equidigital number, since it uses as much as digits as its factorization.

126087191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86280.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 126087191 is about 11228.8552844892. The cubic root of 126087191 is about 501.4454055791.

The spelling of 126087191 in words is "one hundred twenty-six million, eighty-seven thousand, one hundred ninety-one".