126681172 has 6 divisors (see below), whose sum is σ = 221692058. Its totient is φ = 63340584.

The previous prime is 126681167. The next prime is 126681179. The reversal of 126681172 is 271186621.

It can be written as a sum of positive squares in only one way, i.e., 123743376 + 2937796 = 11124^2 + 1714^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126681179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15835143 + ... + 15835150.

Almost surely, 2^126681172 is an apocalyptic number.

It is an amenable number.

126681172 is a deficient number, since it is larger than the sum of its proper divisors (95010886).

126681172 is a wasteful number, since it uses less digits than its factorization.

126681172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31670297 (or 31670295 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 126681172 is about 11255.2730753190. The cubic root of 126681172 is about 502.2315878800.

The spelling of 126681172 in words is "one hundred twenty-six million, six hundred eighty-one thousand, one hundred seventy-two".