135478641 has 4 divisors (see below), whose sum is σ = 180638192. Its totient is φ = 90319092.

The previous prime is 135478561. The next prime is 135478657. The reversal of 135478641 is 146874531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135478641 - 2⁷ = 135478513 is a prime.

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 135478641.

It is not an unprimeable number, because it can be changed into a prime (135478141) 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, 22579771 + ... + 22579776.

It is an arithmetic number, because the mean of its divisors is an integer number (45159548).

Almost surely, 2^135478641 is an apocalyptic number.

It is an amenable number.

135478641 is a deficient number, since it is larger than the sum of its proper divisors (45159551).

135478641 is an equidigital number, since it uses as much as digits as its factorization.

135478641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45159550.

The product of its digits is 80640, while the sum is 39.

The square root of 135478641 is about 11639.5292430579. The cubic root of 135478641 is about 513.5983389750.

The spelling of 135478641 in words is "one hundred thirty-five million, four hundred seventy-eight thousand, six hundred forty-one".