126161311 has 4 divisors (see below), whose sum is σ = 132801400. Its totient is φ = 119521224.

The previous prime is 126161309. The next prime is 126161317. The reversal of 126161311 is 113161621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113161621 = 211 ⋅536311.

It is a cyclic number.

It is not a de Polignac number, because 126161311 - 2¹ = 126161309 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 (126161317) 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, 3320016 + ... + 3320053.

It is an arithmetic number, because the mean of its divisors is an integer number (33200350).

Almost surely, 2^126161311 is an apocalyptic number.

126161311 is a deficient number, since it is larger than the sum of its proper divisors (6640089).

126161311 is an equidigital number, since it uses as much as digits as its factorization.

126161311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640088.

The product of its digits is 216, while the sum is 22.

The square root of 126161311 is about 11232.1552250670. The cubic root of 126161311 is about 501.5436440882.

The spelling of 126161311 in words is "one hundred twenty-six million, one hundred sixty-one thousand, three hundred eleven".