136404146 has 4 divisors (see below), whose sum is σ = 204606222. Its totient is φ = 68202072.

The previous prime is 136404133. The next prime is 136404167. The reversal of 136404146 is 641404631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641404631 = 7 ⋅91629233.

It can be written as a sum of positive squares in only one way, i.e., 88642225 + 47761921 = 9415^2 + 6911^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34101035 + ... + 34101038.

Almost surely, 2^136404146 is an apocalyptic number.

136404146 is a deficient number, since it is larger than the sum of its proper divisors (68202076).

136404146 is an equidigital number, since it uses as much as digits as its factorization.

136404146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68202075.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 136404146 is about 11679.2185526259. The cubic root of 136404146 is about 514.7652129889.

Adding to 136404146 its reverse (641404631), we get a palindrome (777808777).

The spelling of 136404146 in words is "one hundred thirty-six million, four hundred four thousand, one hundred forty-six".