135251775 has 30 divisors (see below), whose sum is σ = 250536792. Its totient is φ = 72133200.

The previous prime is 135251749. The next prime is 135251803. The reversal of 135251775 is 577152531.

It is a happy number.

135251775 is a `hidden beast` number, since 135 + 2 + 517 + 7 + 5 = 666.

It is not a de Polignac number, because 135251775 - 2¹¹ = 135249727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 31371 + ... + 35420.

Almost surely, 2^135251775 is an apocalyptic number.

135251775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135251775 is a deficient number, since it is larger than the sum of its proper divisors (115285017).

135251775 is an equidigital number, since it uses as much as digits as its factorization.

135251775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66813 (or 66799 counting only the distinct ones).

The product of its digits is 36750, while the sum is 36.

The square root of 135251775 is about 11629.7796625731. The cubic root of 135251775 is about 513.3114964662.

The spelling of 135251775 in words is "one hundred thirty-five million, two hundred fifty-one thousand, seven hundred seventy-five".