135666249 has 8 divisors (see below), whose sum is σ = 180974112. Its totient is φ = 90401280.

The previous prime is 135666229. The next prime is 135666269. The reversal of 135666249 is 942666531.

It is an interprime number because it is at equal distance from previous prime (135666229) and next prime (135666269).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135666249 - 2⁹ = 135665737 is a prime.

It is a super-2 number, since 2×135666249² = 36810662235460002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135666249.

It is not an unprimeable number, because it can be changed into a prime (135666229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2424 + ... + 16649.

It is an arithmetic number, because the mean of its divisors is an integer number (22621764).

Almost surely, 2^135666249 is an apocalyptic number.

It is an amenable number.

135666249 is a deficient number, since it is larger than the sum of its proper divisors (45307863).

135666249 is a wasteful number, since it uses less digits than its factorization.

135666249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21447.

The product of its digits is 233280, while the sum is 42.

The square root of 135666249 is about 11647.5855437940. The cubic root of 135666249 is about 513.8353030548.

The spelling of 135666249 in words is "one hundred thirty-five million, six hundred sixty-six thousand, two hundred forty-nine".