136504042 has 4 divisors (see below), whose sum is σ = 204756066. Its totient is φ = 68252020.

The previous prime is 136504007. The next prime is 136504061. The reversal of 136504042 is 240405631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240405631 = 331 ⋅726301.

It can be written as a sum of positive squares in only one way, i.e., 125686521 + 10817521 = 11211^2 + 3289^2 .

It is a junction number, because it is equal to n+sod(n) for n = 136503998 and 136504016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34126009 + ... + 34126012.

Almost surely, 2^136504042 is an apocalyptic number.

136504042 is a deficient number, since it is larger than the sum of its proper divisors (68252024).

136504042 is an equidigital number, since it uses as much as digits as its factorization.

136504042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68252023.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 136504042 is about 11683.4944258984. The cubic root of 136504042 is about 514.8908456256.

Adding to 136504042 its reverse (240405631), we get a palindrome (376909673).

The spelling of 136504042 in words is "one hundred thirty-six million, five hundred four thousand, forty-two".