126843681 has 32 divisors (see below), whose sum is σ = 184197888. Its totient is φ = 77342720.

The previous prime is 126843649. The next prime is 126843683. The reversal of 126843681 is 186348621.

It is a cyclic number.

It is not a de Polignac number, because 126843681 - 2⁵ = 126843649 is a prime.

It is a super-2 number, since 2×126843681² = 32178638819259522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126843683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451261 + ... + 451541.

It is an arithmetic number, because the mean of its divisors is an integer number (5756184).

Almost surely, 2^126843681 is an apocalyptic number.

It is an amenable number.

126843681 is a deficient number, since it is larger than the sum of its proper divisors (57354207).

126843681 is a wasteful number, since it uses less digits than its factorization.

126843681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its digits is 55296, while the sum is 39.

The square root of 126843681 is about 11262.4899999956. The cubic root of 126843681 is about 502.4462535026.

The spelling of 126843681 in words is "one hundred twenty-six million, eight hundred forty-three thousand, six hundred eighty-one".