136720442 has 8 divisors (see below), whose sum is σ = 212152500. Its totient is φ = 66002944.

The previous prime is 136720411. The next prime is 136720469. The reversal of 136720442 is 244027631.

It can be written as a sum of positive squares in 2 ways, for example, as 117527281 + 19193161 = 10841^2 + 4381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178567 + ... + 1178682.

Almost surely, 2^136720442 is an apocalyptic number.

136720442 is a deficient number, since it is larger than the sum of its proper divisors (75432058).

136720442 is a wasteful number, since it uses less digits than its factorization.

136720442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357280.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 136720442 is about 11692.7516864081. The cubic root of 136720442 is about 515.1627876375.

The spelling of 136720442 in words is "one hundred thirty-six million, seven hundred twenty thousand, four hundred forty-two".