126631161 has 16 divisors (see below), whose sum is σ = 187878720. Its totient is φ = 84296160.

The previous prime is 126631157. The next prime is 126631163. The reversal of 126631161 is 161136621.

126631161 is a `hidden beast` number, since 1 + 26 + 631 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 126631161 - 2² = 126631157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126631163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17466 + ... + 23628.

It is an arithmetic number, because the mean of its divisors is an integer number (11742420).

Almost surely, 2^126631161 is an apocalyptic number.

It is an amenable number.

126631161 is a deficient number, since it is larger than the sum of its proper divisors (61247559).

126631161 is an equidigital number, since it uses as much as digits as its factorization.

126631161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6933 (or 6927 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 126631161 is about 11253.0511862339. The cubic root of 126631161 is about 502.1654891076.

Adding to 126631161 its reverse (161136621), we get a palindrome (287767782).

It can be divided in two parts, 12663 and 1161, that added together give a cube (13824 = 24³).

The spelling of 126631161 in words is "one hundred twenty-six million, six hundred thirty-one thousand, one hundred sixty-one".