136243045 has 4 divisors (see below), whose sum is σ = 163491660. Its totient is φ = 108994432.

The previous prime is 136243043. The next prime is 136243057. The reversal of 136243045 is 540342631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540342631 = 929 ⋅581639.

It can be written as a sum of positive squares in 2 ways, for example, as 67535524 + 68707521 = 8218^2 + 8289^2 .

It is a cyclic number.

It is not a de Polignac number, because 136243045 - 2¹ = 136243043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136243043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13624300 + ... + 13624309.

It is an arithmetic number, because the mean of its divisors is an integer number (40872915).

Almost surely, 2^136243045 is an apocalyptic number.

It is an amenable number.

136243045 is a deficient number, since it is larger than the sum of its proper divisors (27248615).

136243045 is an equidigital number, since it uses as much as digits as its factorization.

136243045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27248614.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 136243045 is about 11672.3196066592. The cubic root of 136243045 is about 514.5624775577.

Adding to 136243045 its reverse (540342631), we get a palindrome (676585676).

The spelling of 136243045 in words is "one hundred thirty-six million, two hundred forty-three thousand, forty-five".