135041240521 has 8 divisors (see below), whose sum is σ = 147320740224. Its totient is φ = 122762244720.

The previous prime is 135041240497. The next prime is 135041240531. The reversal of 135041240521 is 125042140531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135041240521 - 2¹³ = 135041232329 is a prime.

It is a super-2 number, since 2×135041240521² (a number of 23 digits) 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 135041240521.

It is not an unprimeable number, because it can be changed into a prime (135041240531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633456 + ... + 819358.

It is an arithmetic number, because the mean of its divisors is an integer number (18415092528).

Almost surely, 2^135041240521 is an apocalyptic number.

135041240521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135041240521 is a deficient number, since it is larger than the sum of its proper divisors (12279499703).

135041240521 is a wasteful number, since it uses less digits than its factorization.

135041240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251951.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 135041240521 in words is "one hundred thirty-five billion, forty-one million, two hundred forty thousand, five hundred twenty-one".