126155091 has 4 divisors (see below), whose sum is σ = 168206792. Its totient is φ = 84103392.

The previous prime is 126155059. The next prime is 126155101. The reversal of 126155091 is 190551621.

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

It is not a de Polignac number, because 126155091 - 2⁵ = 126155059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126155791) 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, 21025846 + ... + 21025851.

It is an arithmetic number, because the mean of its divisors is an integer number (42051698).

Almost surely, 2^126155091 is an apocalyptic number.

126155091 is a deficient number, since it is larger than the sum of its proper divisors (42051701).

126155091 is an equidigital number, since it uses as much as digits as its factorization.

126155091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42051700.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 126155091 is about 11231.8783380163. The cubic root of 126155091 is about 501.5354015910.

The spelling of 126155091 in words is "one hundred twenty-six million, one hundred fifty-five thousand, ninety-one".