135420111 has 36 divisors (see below), whose sum is σ = 208517400. Its totient is φ = 84587328.

The previous prime is 135420101. The next prime is 135420119. The reversal of 135420111 is 111024531.

135420111 is a `hidden beast` number, since 13 + 542 + 0 + 111 = 666.

It is not a de Polignac number, because 135420111 - 2¹⁴ = 135403727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135420119) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 357120 + ... + 357498.

It is an arithmetic number, because the mean of its divisors is an integer number (5792150).

Almost surely, 2^135420111 is an apocalyptic number.

135420111 is a deficient number, since it is larger than the sum of its proper divisors (73097289).

135420111 is a wasteful number, since it uses less digits than its factorization.

135420111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 135420111 is about 11637.0146944996. The cubic root of 135420111 is about 513.5243660825.

Adding to 135420111 its reverse (111024531), we get a palindrome (246444642).

It can be divided in two parts, 135420 and 111, that added together give a palindrome (135531).

The spelling of 135420111 in words is "one hundred thirty-five million, four hundred twenty thousand, one hundred eleven".