136571720 has 16 divisors (see below), whose sum is σ = 307286460. Its totient is φ = 54628672.

The previous prime is 136571689. The next prime is 136571731. The reversal of 136571720 is 27175631.

It can be written as a sum of positive squares in 2 ways, for example, as 136282276 + 289444 = 11674^2 + 538^2 .

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, 1707107 + ... + 1707186.

Almost surely, 2^136571720 is an apocalyptic number.

136571720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136571720 is an abundant number, since it is smaller than the sum of its proper divisors (170714740).

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

136571720 is a wasteful number, since it uses less digits than its factorization.

136571720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414304 (or 3414300 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 136571720 is about 11686.3903751329. The cubic root of 136571720 is about 514.9759249750.

The spelling of 136571720 in words is "one hundred thirty-six million, five hundred seventy-one thousand, seven hundred twenty".