135247478 has 8 divisors (see below), whose sum is σ = 214804872. Its totient is φ = 63645856.

The previous prime is 135247439. The next prime is 135247531. The reversal of 135247478 is 874742531.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988900 + ... + 1988967.

It is an arithmetic number, because the mean of its divisors is an integer number (26850609).

Almost surely, 2^135247478 is an apocalyptic number.

135247478 is a deficient number, since it is larger than the sum of its proper divisors (79557394).

135247478 is a wasteful number, since it uses less digits than its factorization.

135247478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977886.

The product of its digits is 188160, while the sum is 41.

The square root of 135247478 is about 11629.5949198586. The cubic root of 135247478 is about 513.3060603752.

The spelling of 135247478 in words is "one hundred thirty-five million, two hundred forty-seven thousand, four hundred seventy-eight".