136420242 has 32 divisors (see below), whose sum is σ = 313746432. Its totient is φ = 38736144.

The previous prime is 136420237. The next prime is 136420253. The reversal of 136420242 is 242024631.

It is a super-2 number, since 2×136420242² = 37220964854677128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3118 + ... + 16809.

It is an arithmetic number, because the mean of its divisors is an integer number (9804576).

Almost surely, 2^136420242 is an apocalyptic number.

136420242 is an abundant number, since it is smaller than the sum of its proper divisors (177326190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136420242 is a wasteful number, since it uses less digits than its factorization.

136420242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20102.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 136420242 is about 11679.9076194977. The cubic root of 136420242 is about 514.7854600151.

Adding to 136420242 its reverse (242024631), we get a palindrome (378444873).

The spelling of 136420242 in words is "one hundred thirty-six million, four hundred twenty thousand, two hundred forty-two".