126698161 has 4 divisors (see below), whose sum is σ = 134151012. Its totient is φ = 119245312.

The previous prime is 126698153. The next prime is 126698171. The reversal of 126698161 is 161896621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98406400 + 28291761 = 9920^2 + 5319^2 .

It is a cyclic number.

It is not a de Polignac number, because 126698161 - 2³ = 126698153 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (126698111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3726400 + ... + 3726433.

It is an arithmetic number, because the mean of its divisors is an integer number (33537753).

Almost surely, 2^126698161 is an apocalyptic number.

It is an amenable number.

126698161 is a deficient number, since it is larger than the sum of its proper divisors (7452851).

126698161 is an equidigital number, since it uses as much as digits as its factorization.

126698161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7452850.

The product of its digits is 31104, while the sum is 40.

The square root of 126698161 is about 11256.0277629366. The cubic root of 126698161 is about 502.2540380224.

The spelling of 126698161 in words is "one hundred twenty-six million, six hundred ninety-eight thousand, one hundred sixty-one".