136781265 has 8 divisors (see below), whose sum is σ = 218850048. Its totient is φ = 72950000.

The previous prime is 136781263. The next prime is 136781273. The reversal of 136781265 is 562187631.

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

It is not a de Polignac number, because 136781265 - 2¹ = 136781263 is a prime.

It is a super-2 number, since 2×136781265² = 37418228910000450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136781263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4559361 + ... + 4559390.

It is an arithmetic number, because the mean of its divisors is an integer number (27356256).

Almost surely, 2^136781265 is an apocalyptic number.

136781265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136781265 is a deficient number, since it is larger than the sum of its proper divisors (82068783).

136781265 is an equidigital number, since it uses as much as digits as its factorization.

136781265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9118759.

The product of its digits is 60480, while the sum is 39.

The square root of 136781265 is about 11695.3522819965. The cubic root of 136781265 is about 515.2391700239.

The spelling of 136781265 in words is "one hundred thirty-six million, seven hundred eighty-one thousand, two hundred sixty-five".