126981786 has 16 divisors (see below), whose sum is σ = 254883744. Its totient is φ = 42173904.

The previous prime is 126981779. The next prime is 126981791. The reversal of 126981786 is 687189621.

It is a super-2 number, since 2×126981786² = 32248747951499592, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36540 + ... + 39863.

It is an arithmetic number, because the mean of its divisors is an integer number (15930234).

Almost surely, 2^126981786 is an apocalyptic number.

126981786 is an abundant number, since it is smaller than the sum of its proper divisors (127901958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126981786 is a wasteful number, since it uses less digits than its factorization.

126981786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76685.

The product of its digits is 290304, while the sum is 48.

The square root of 126981786 is about 11268.6195250350. The cubic root of 126981786 is about 502.6285386872.

The spelling of 126981786 in words is "one hundred twenty-six million, nine hundred eighty-one thousand, seven hundred eighty-six".