126240181 has 8 divisors (see below), whose sum is σ = 135169560. Its totient is φ = 117477888.

The previous prime is 126240173. The next prime is 126240193. The reversal of 126240181 is 181042621.

It can be written as a sum of positive squares in 4 ways, for example, as 576081 + 125664100 = 759^2 + 11210^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126240181 - 2³ = 126240173 is a prime.

It is a super-2 number, since 2×126240181² = 31873166597825522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126240481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40206 + ... + 43231.

It is an arithmetic number, because the mean of its divisors is an integer number (16896195).

Almost surely, 2^126240181 is an apocalyptic number.

It is an amenable number.

126240181 is a deficient number, since it is larger than the sum of its proper divisors (8929379).

126240181 is an equidigital number, since it uses as much as digits as its factorization.

126240181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83543.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 126240181 is about 11235.6655788609. The cubic root of 126240181 is about 501.6481359929.

The spelling of 126240181 in words is "one hundred twenty-six million, two hundred forty thousand, one hundred eighty-one".