12137161 has 4 divisors (see below), whose sum is σ = 12207492. Its totient is φ = 12066832.

The previous prime is 12137131. The next prime is 12137183. The reversal of 12137161 is 16173121.

12137161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16173121 = 1093 ⋅14797.

It can be written as a sum of positive squares in 2 ways, for example, as 6661561 + 5475600 = 2581^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 12137161 - 2⁵ = 12137129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12137131) 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, 34906 + ... + 35251.

It is an arithmetic number, because the mean of its divisors is an integer number (3051873).

Almost surely, 2^12137161 is an apocalyptic number.

It is an amenable number.

12137161 is a deficient number, since it is larger than the sum of its proper divisors (70331).

12137161 is an equidigital number, since it uses as much as digits as its factorization.

12137161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70330.

The product of its digits is 252, while the sum is 22.

The square root of 12137161 is about 3483.8428494982. The cubic root of 12137161 is about 229.8118246616.

The spelling of 12137161 in words is "twelve million, one hundred thirty-seven thousand, one hundred sixty-one".