136254478 has 4 divisors (see below), whose sum is σ = 204381720. Its totient is φ = 68127238.

The previous prime is 136254463. The next prime is 136254493. The reversal of 136254478 is 874452631.

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

It is an interprime number because it is at equal distance from previous prime (136254463) and next prime (136254493).

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 a self number, because there is not a number n which added to its sum of digits gives 136254478.

It is a congruent number.

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, 34063618 + ... + 34063621.

It is an arithmetic number, because the mean of its divisors is an integer number (51095430).

Almost surely, 2^136254478 is an apocalyptic number.

136254478 is a deficient number, since it is larger than the sum of its proper divisors (68127242).

136254478 is an equidigital number, since it uses as much as digits as its factorization.

136254478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68127241.

The product of its digits is 161280, while the sum is 40.

The square root of 136254478 is about 11672.8093447978. The cubic root of 136254478 is about 514.5768705328.

The spelling of 136254478 in words is "one hundred thirty-six million, two hundred fifty-four thousand, four hundred seventy-eight".