135429681 has 32 divisors (see below), whose sum is σ = 198754560. Its totient is φ = 81745664.

The previous prime is 135429677. The next prime is 135429703. The reversal of 135429681 is 186924531.

It is not a de Polignac number, because 135429681 - 2² = 135429677 is a prime.

It is a super-2 number, since 2×135429681² = 36682396991523522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135429611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105415 + ... + 106691.

It is an arithmetic number, because the mean of its divisors is an integer number (6211080).

Almost surely, 2^135429681 is an apocalyptic number.

It is an amenable number.

135429681 is a deficient number, since it is larger than the sum of its proper divisors (63324879).

135429681 is a wasteful number, since it uses less digits than its factorization.

135429681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385.

The product of its digits is 51840, while the sum is 39.

The square root of 135429681 is about 11637.4258751667. The cubic root of 135429681 is about 513.5364625439.

The spelling of 135429681 in words is "one hundred thirty-five million, four hundred twenty-nine thousand, six hundred eighty-one".