136628242 has 4 divisors (see below), whose sum is σ = 204942366. Its totient is φ = 68314120.

The previous prime is 136628213. The next prime is 136628249. The reversal of 136628242 is 242826631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242826631 = 19 ⋅12780349.

It can be written as a sum of positive squares in only one way, i.e., 86657481 + 49970761 = 9309^2 + 7069^2 .

It is a junction number, because it is equal to n+sod(n) for n = 136628198 and 136628207.

It is not an unprimeable number, because it can be changed into a prime (136628249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34157059 + ... + 34157062.

Almost surely, 2^136628242 is an apocalyptic number.

136628242 is a deficient number, since it is larger than the sum of its proper divisors (68314124).

136628242 is an equidigital number, since it uses as much as digits as its factorization.

136628242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68314123.

The product of its digits is 27648, while the sum is 34.

The square root of 136628242 is about 11688.8084080457. The cubic root of 136628242 is about 515.0469583599.

It can be divided in two parts, 13662 and 8242, that added together give a square (21904 = 148²).

The spelling of 136628242 in words is "one hundred thirty-six million, six hundred twenty-eight thousand, two hundred forty-two".