135404531 has 4 divisors (see below), whose sum is σ = 136800552. Its totient is φ = 134008512.

The previous prime is 135404513. The next prime is 135404551.

135404531 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135404531 - 2¹⁴ = 135388147 is a prime.

It is a super-2 number, since 2×135404531² = 36668774030659922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135404531.

It is not an unprimeable number, because it can be changed into a prime (135404501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697865 + ... + 698058.

It is an arithmetic number, because the mean of its divisors is an integer number (34200138).

Almost surely, 2^135404531 is an apocalyptic number.

135404531 is a deficient number, since it is larger than the sum of its proper divisors (1396021).

135404531 is an equidigital number, since it uses as much as digits as its factorization.

135404531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396020.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 135404531 is about 11636.3452595736. The cubic root of 135404531 is about 513.5046717737.

The spelling of 135404531 in words is "one hundred thirty-five million, four hundred four thousand, five hundred thirty-one".