134778215 has 32 divisors (see below), whose sum is σ = 191020032. Its totient is φ = 90000000.

The previous prime is 134778199. The next prime is 134778223. The reversal of 134778215 is 512877431.

It is not a de Polignac number, because 134778215 - 2⁴ = 134778199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179090 + ... + 179840.

It is an arithmetic number, because the mean of its divisors is an integer number (5969376).

Almost surely, 2^134778215 is an apocalyptic number.

134778215 is a deficient number, since it is larger than the sum of its proper divisors (56241817).

134778215 is a wasteful number, since it uses less digits than its factorization.

134778215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its digits is 47040, while the sum is 38.

The square root of 134778215 is about 11609.4020087169. The cubic root of 134778215 is about 512.7117063087.

The spelling of 134778215 in words is "one hundred thirty-four million, seven hundred seventy-eight thousand, two hundred fifteen".