136642005 has 32 divisors (see below), whose sum is σ = 257212800. Its totient is φ = 68587776.

The previous prime is 136641983. The next prime is 136642043. The reversal of 136642005 is 500246631.

136642005 is a `hidden beast` number, since 13 + 6 + 642 + 0 + 0 + 5 = 666.

It is not a de Polignac number, because 136642005 - 2⁶ = 136641941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 136642005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27475 + ... + 32064.

It is an arithmetic number, because the mean of its divisors is an integer number (8037900).

Almost surely, 2^136642005 is an apocalyptic number.

136642005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136642005 is a deficient number, since it is larger than the sum of its proper divisors (120570795).

136642005 is a wasteful number, since it uses less digits than its factorization.

136642005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59570 (or 59564 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 136642005 is about 11689.3971187568. The cubic root of 136642005 is about 515.0642518887.

Adding to 136642005 its reverse (500246631), we get a palindrome (636888636).

The spelling of 136642005 in words is "one hundred thirty-six million, six hundred forty-two thousand, five".