136325281 has 4 divisors (see below), whose sum is σ = 137366064. Its totient is φ = 135284500.

The previous prime is 136325251. The next prime is 136325291. The reversal of 136325281 is 182523631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182523631 = 8101 ⋅22531.

It is a cyclic number.

It is not a de Polignac number, because 136325281 - 2⁷ = 136325153 is a prime.

It is a super-2 number, since 2×136325281² = 37169164479457922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136325251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520195 + ... + 520456.

It is an arithmetic number, because the mean of its divisors is an integer number (34341516).

Almost surely, 2^136325281 is an apocalyptic number.

It is an amenable number.

136325281 is a deficient number, since it is larger than the sum of its proper divisors (1040783).

136325281 is a wasteful number, since it uses less digits than its factorization.

136325281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040782.

The product of its digits is 8640, while the sum is 31.

The square root of 136325281 is about 11675.8417683694. The cubic root of 136325281 is about 514.6659863250.

The spelling of 136325281 in words is "one hundred thirty-six million, three hundred twenty-five thousand, two hundred eighty-one".