136250805 has 32 divisors (see below), whose sum is σ = 230768640. Its totient is φ = 68454720.

The previous prime is 136250771. The next prime is 136250809. The reversal of 136250805 is 508052631.

It is not a de Polignac number, because 136250805 - 2⁷ = 136250677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136250809) 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 31 ways as a sum of consecutive naturals, for example, 53184 + ... + 55686.

It is an arithmetic number, because the mean of its divisors is an integer number (7211520).

Almost surely, 2^136250805 is an apocalyptic number.

136250805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136250805 is a deficient number, since it is larger than the sum of its proper divisors (94517835).

136250805 is a wasteful number, since it uses less digits than its factorization.

136250805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 136250805 is about 11672.6520122892. The cubic root of 136250805 is about 514.5722466901.

The spelling of 136250805 in words is "one hundred thirty-six million, two hundred fifty thousand, eight hundred five".