126978234 has 16 divisors (see below), whose sum is σ = 254505888. Its totient is φ = 42234512.

The previous prime is 126978233. The next prime is 126978251. The reversal of 126978234 is 432879621.

It is a super-2 number, since 2×126978234² = 32246943819517512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (126978233) by changing a digit.

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, 19857 + ... + 25460.

It is an arithmetic number, because the mean of its divisors is an integer number (15906618).

Almost surely, 2^126978234 is an apocalyptic number.

126978234 is an abundant number, since it is smaller than the sum of its proper divisors (127527654).

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

126978234 is a wasteful number, since it uses less digits than its factorization.

126978234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45789.

The product of its digits is 145152, while the sum is 42.

The square root of 126978234 is about 11268.4619181146. The cubic root of 126978234 is about 502.6238520486.

The spelling of 126978234 in words is "one hundred twenty-six million, nine hundred seventy-eight thousand, two hundred thirty-four".