126691144 has 32 divisors (see below), whose sum is σ = 244236600. Its totient is φ = 61585920.

The previous prime is 126691129. The next prime is 126691177. The reversal of 126691144 is 441196621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 99002500 + 27688644 = 9950^2 + 5262^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41974 + ... + 44890.

Almost surely, 2^126691144 is an apocalyptic number.

It is an amenable number.

126691144 is a deficient number, since it is larger than the sum of its proper divisors (117545456).

126691144 is a wasteful number, since it uses less digits than its factorization.

126691144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073 (or 3069 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 126691144 is about 11255.7160589631. The cubic root of 126691144 is about 502.2447656394.

The spelling of 126691144 in words is "one hundred twenty-six million, six hundred ninety-one thousand, one hundred forty-four".