135042321403 has 12 divisors (see below), whose sum is σ = 148530367440. Its totient is φ = 122686828880.

The previous prime is 135042321391. The next prime is 135042321433. The reversal of 135042321403 is 304123240531.

It is a happy number.

It is not a de Polignac number, because 135042321403 - 2¹⁷ = 135042190331 is a prime.

It is a super-2 number, since 2×135042321403² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135042321433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169300 + ... + 546577.

It is an arithmetic number, because the mean of its divisors is an integer number (12377530620).

Almost surely, 2^135042321403 is an apocalyptic number.

135042321403 is a deficient number, since it is larger than the sum of its proper divisors (13488046037).

135042321403 is a wasteful number, since it uses less digits than its factorization.

135042321403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717458 (or 717447 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 135042321403 its reverse (304123240531), we get a palindrome (439165561934).

The spelling of 135042321403 in words is "one hundred thirty-five billion, forty-two million, three hundred twenty-one thousand, four hundred three".