126381994 has 4 divisors (see below), whose sum is σ = 189572994. Its totient is φ = 63190996.

The previous prime is 126381991. The next prime is 126382021. The reversal of 126381994 is 499183621.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 78978769 + 47403225 = 8887^2 + 6885^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 126381994.

It is not an unprimeable number, because it can be changed into a prime (126381991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31595497 + ... + 31595500.

Almost surely, 2^126381994 is an apocalyptic number.

126381994 is a deficient number, since it is larger than the sum of its proper divisors (63191000).

126381994 is an equidigital number, since it uses as much as digits as its factorization.

126381994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63190999.

The product of its digits is 93312, while the sum is 43.

The square root of 126381994 is about 11241.9746486104. The cubic root of 126381994 is about 501.8359092901.

The spelling of 126381994 in words is "one hundred twenty-six million, three hundred eighty-one thousand, nine hundred ninety-four".