126942878 has 4 divisors (see below), whose sum is σ = 190414320. Its totient is φ = 63471438.

The previous prime is 126942877. The next prime is 126942883. The reversal of 126942878 is 878249621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×126942878² = 32228988549845768, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126942877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31735718 + ... + 31735721.

It is an arithmetic number, because the mean of its divisors is an integer number (47603580).

Almost surely, 2^126942878 is an apocalyptic number.

126942878 is a deficient number, since it is larger than the sum of its proper divisors (63471442).

126942878 is an equidigital number, since it uses as much as digits as its factorization.

126942878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63471441.

The product of its digits is 387072, while the sum is 47.

The square root of 126942878 is about 11266.8930056161. The cubic root of 126942878 is about 502.5771972848.

The spelling of 126942878 in words is "one hundred twenty-six million, nine hundred forty-two thousand, eight hundred seventy-eight".