136642045 has 4 divisors (see below), whose sum is σ = 163970460. Its totient is φ = 109313632.

The previous prime is 136642043. The next prime is 136642049. The reversal of 136642045 is 540246631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540246631 = 2269 ⋅238099.

It can be written as a sum of positive squares in 2 ways, for example, as 76842756 + 59799289 = 8766^2 + 7733^2 .

It is a cyclic number.

It is not a de Polignac number, because 136642045 - 2¹ = 136642043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136641998 and 136642016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136642043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13664200 + ... + 13664209.

It is an arithmetic number, because the mean of its divisors is an integer number (40992615).

Almost surely, 2^136642045 is an apocalyptic number.

It is an amenable number.

136642045 is a deficient number, since it is larger than the sum of its proper divisors (27328415).

136642045 is an equidigital number, since it uses as much as digits as its factorization.

136642045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27328414.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 136642045 is about 11689.3988297089. The cubic root of 136642045 is about 515.0643021479.

Adding to 136642045 its reverse (540246631), we get a palindrome (676888676).

The spelling of 136642045 in words is "one hundred thirty-six million, six hundred forty-two thousand, forty-five".