126839649 has 16 divisors (see below), whose sum is σ = 184161600. Its totient is φ = 77345856.

The previous prime is 126839639. The next prime is 126839681. The reversal of 126839649 is 946938621.

It is not a de Polignac number, because 126839649 - 2⁸ = 126839393 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 126839598 and 126839607.

It is not an unprimeable number, because it can be changed into a prime (126839639) 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, 36714 + ... + 40019.

It is an arithmetic number, because the mean of its divisors is an integer number (11510100).

Almost surely, 2^126839649 is an apocalyptic number.

126839649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

126839649 is a deficient number, since it is larger than the sum of its proper divisors (57321951).

126839649 is a wasteful number, since it uses less digits than its factorization.

126839649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76784.

The product of its digits is 559872, while the sum is 48.

The square root of 126839649 is about 11262.3109973042. The cubic root of 126839649 is about 502.4409296669.

The spelling of 126839649 in words is "one hundred twenty-six million, eight hundred thirty-nine thousand, six hundred forty-nine".