135149842 has 4 divisors (see below), whose sum is σ = 202724766. Its totient is φ = 67574920.

The previous prime is 135149837. The next prime is 135149843. The reversal of 135149842 is 248941531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248941531 = 409 ⋅608659.

It can be written as a sum of positive squares in only one way, i.e., 95472441 + 39677401 = 9771^2 + 6299^2 .

It is not an unprimeable number, because it can be changed into a prime (135149843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33787459 + ... + 33787462.

Almost surely, 2^135149842 is an apocalyptic number.

135149842 is a deficient number, since it is larger than the sum of its proper divisors (67574924).

135149842 is an equidigital number, since it uses as much as digits as its factorization.

135149842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67574923.

The product of its digits is 34560, while the sum is 37.

The square root of 135149842 is about 11625.3964233483. The cubic root of 135149842 is about 513.1825110220.

The spelling of 135149842 in words is "one hundred thirty-five million, one hundred forty-nine thousand, eight hundred forty-two".