126473818 has 4 divisors (see below), whose sum is σ = 189710730. Its totient is φ = 63236908.

The previous prime is 126473813. The next prime is 126473821. The reversal of 126473818 is 818374621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818374621 = 37 ⋅22118233.

It can be written as a sum of positive squares in only one way, i.e., 98942809 + 27531009 = 9947^2 + 5247^2 .

It is a Smith number, since the sum of its digits (40) 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 (126473813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31618453 + ... + 31618456.

Almost surely, 2^126473818 is an apocalyptic number.

126473818 is a deficient number, since it is larger than the sum of its proper divisors (63236912).

126473818 is an equidigital number, since it uses as much as digits as its factorization.

126473818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63236911.

The product of its digits is 64512, while the sum is 40.

The square root of 126473818 is about 11246.0578870998. The cubic root of 126473818 is about 501.9574176988.

The spelling of 126473818 in words is "one hundred twenty-six million, four hundred seventy-three thousand, eight hundred eighteen".