135420521542 has 4 divisors (see below), whose sum is σ = 203130782316. Its totient is φ = 67710260770.

The previous prime is 135420521521. The next prime is 135420521573. The reversal of 135420521542 is 245125024531.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 135420521498 and 135420521507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33855130384 + ... + 33855130387.

It is an arithmetic number, because the mean of its divisors is an integer number (50782695579).

Almost surely, 2^135420521542 is an apocalyptic number.

135420521542 is a deficient number, since it is larger than the sum of its proper divisors (67710260774).

135420521542 is an equidigital number, since it uses as much as digits as its factorization.

135420521542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67710260773.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 135420521542 in words is "one hundred thirty-five billion, four hundred twenty million, five hundred twenty-one thousand, five hundred forty-two".