126981859 has 4 divisors (see below), whose sum is σ = 131078080. Its totient is φ = 122885640.

The previous prime is 126981851. The next prime is 126981889. The reversal of 126981859 is 958189621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958189621 = 349 ⋅2745529.

It is a cyclic number.

It is not a de Polignac number, because 126981859 - 2³ = 126981851 is a prime.

It is a super-2 number, since 2×126981859² = 32248785030191762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126981851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048064 + ... + 2048125.

It is an arithmetic number, because the mean of its divisors is an integer number (32769520).

Almost surely, 2^126981859 is an apocalyptic number.

126981859 is a deficient number, since it is larger than the sum of its proper divisors (4096221).

126981859 is an equidigital number, since it uses as much as digits as its factorization.

126981859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096220.

The product of its digits is 311040, while the sum is 49.

The square root of 126981859 is about 11268.6227641181. The cubic root of 126981859 is about 502.6286350052.

The spelling of 126981859 in words is "one hundred twenty-six million, nine hundred eighty-one thousand, eight hundred fifty-nine".