135245986 has 4 divisors (see below), whose sum is σ = 202868982. Its totient is φ = 67622992.

The previous prime is 135245941. The next prime is 135245987. The reversal of 135245986 is 689542531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689542531 = 20887 ⋅33013.

It can be written as a sum of positive squares in only one way, i.e., 133841761 + 1404225 = 11569^2 + 1185^2 .

It is a super-2 number, since 2×135245986² = 36582953458224392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135245987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33811495 + ... + 33811498.

Almost surely, 2^135245986 is an apocalyptic number.

135245986 is a deficient number, since it is larger than the sum of its proper divisors (67622996).

135245986 is an equidigital number, since it uses as much as digits as its factorization.

135245986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67622995.

The product of its digits is 259200, while the sum is 43.

The square root of 135245986 is about 11629.5307729934. The cubic root of 135245986 is about 513.3041728343.

The spelling of 135245986 in words is "one hundred thirty-five million, two hundred forty-five thousand, nine hundred eighty-six".