135428 has 6 divisors (see below), whose sum is σ = 237006. Its totient is φ = 67712.

The previous prime is 135427. The next prime is 135431. The reversal of 135428 is 824531.

It can be written as a sum of positive squares in only one way, i.e., 135424 + 4 = 368^2 + 2^2 .

It is not an unprimeable number, because it can be changed into a prime (135427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16925 + ... + 16932.

It is an arithmetic number, because the mean of its divisors is an integer number (39501).

2¹³⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

135428 is a deficient number, since it is larger than the sum of its proper divisors (101578).

135428 is a wasteful number, since it uses less digits than its factorization.

135428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33861 (or 33859 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 135428 is about 368.0054347425. The cubic root of 135428 is about 51.3534337804.

Adding to 135428 its reverse (824531), we get a palindrome (959959).

The spelling of 135428 in words is "one hundred thirty-five thousand, four hundred twenty-eight".