135540142 has 16 divisors (see below), whose sum is σ = 212990400. Its totient is φ = 64602720.

The previous prime is 135540107. The next prime is 135540143. The reversal of 135540142 is 241045531.

It is a happy number.

It is a super-2 number, since 2×135540142² = 36742260186760328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135540143) 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, 10209 + ... + 19372.

It is an arithmetic number, because the mean of its divisors is an integer number (13311900).

Almost surely, 2^135540142 is an apocalyptic number.

135540142 is a deficient number, since it is larger than the sum of its proper divisors (77450258).

135540142 is a wasteful number, since it uses less digits than its factorization.

135540142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29691.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 135540142 is about 11642.1708456799. The cubic root of 135540142 is about 513.6760438018.

Adding to 135540142 its reverse (241045531), we get a palindrome (376585673).

The spelling of 135540142 in words is "one hundred thirty-five million, five hundred forty thousand, one hundred forty-two".