134720815 has 8 divisors (see below), whose sum is σ = 161903088. Its totient is φ = 107617920.

The previous prime is 134720797. The next prime is 134720827. The reversal of 134720815 is 518027431.

134720815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 134720815 - 2⁵ = 134720783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16042 + ... + 22951.

It is an arithmetic number, because the mean of its divisors is an integer number (20237886).

Almost surely, 2^134720815 is an apocalyptic number.

134720815 is a deficient number, since it is larger than the sum of its proper divisors (27182273).

134720815 is an equidigital number, since it uses as much as digits as its factorization.

134720815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39689.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 134720815 is about 11606.9296112279. The cubic root of 134720815 is about 512.6389105907.

The spelling of 134720815 in words is "one hundred thirty-four million, seven hundred twenty thousand, eight hundred fifteen".