135494081 has 4 divisors (see below), whose sum is σ = 141385152. Its totient is φ = 129603012.

The previous prime is 135494077. The next prime is 135494089. The reversal of 135494081 is 180494531.

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.

It is a cyclic number.

It is not a de Polignac number, because 135494081 - 2² = 135494077 is a prime.

It is a super-2 number, since 2×135494081² = 36717291972069122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135494089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2945501 + ... + 2945546.

It is an arithmetic number, because the mean of its divisors is an integer number (35346288).

Almost surely, 2^135494081 is an apocalyptic number.

It is an amenable number.

135494081 is a deficient number, since it is larger than the sum of its proper divisors (5891071).

135494081 is an equidigital number, since it uses as much as digits as its factorization.

135494081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891070.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 135494081 is about 11640.1924812264. The cubic root of 135494081 is about 513.6178492020.

The spelling of 135494081 in words is "one hundred thirty-five million, four hundred ninety-four thousand, eighty-one".