126041891 has 4 divisors (see below), whose sum is σ = 127560552. Its totient is φ = 124523232.

The previous prime is 126041887. The next prime is 126041959. The reversal of 126041891 is 198140621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198140621 = 7 ⋅28305803.

It is a cyclic number.

It is not a de Polignac number, because 126041891 - 2² = 126041887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126041491) 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, 759206 + ... + 759371.

It is an arithmetic number, because the mean of its divisors is an integer number (31890138).

Almost surely, 2^126041891 is an apocalyptic number.

126041891 is a deficient number, since it is larger than the sum of its proper divisors (1518661).

126041891 is an equidigital number, since it uses as much as digits as its factorization.

126041891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518660.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 126041891 is about 11226.8379787009. The cubic root of 126041891 is about 501.3853460875.

The spelling of 126041891 in words is "one hundred twenty-six million, forty-one thousand, eight hundred ninety-one".