134778621 has 8 divisors (see below), whose sum is σ = 179781120. Its totient is φ = 89814272.

The previous prime is 134778613. The next prime is 134778649. The reversal of 134778621 is 126877431.

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 134778621 - 2³ = 134778613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 134778621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134778121) 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 7 ways as a sum of consecutive naturals, for example, 100 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (22472640).

Almost surely, 2^134778621 is an apocalyptic number.

It is an amenable number.

134778621 is a deficient number, since it is larger than the sum of its proper divisors (45002499).

134778621 is a wasteful number, since it uses less digits than its factorization.

134778621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19075.

The product of its digits is 56448, while the sum is 39.

The square root of 134778621 is about 11609.4194945312. The cubic root of 134778621 is about 512.7122211316.

The spelling of 134778621 in words is "one hundred thirty-four million, seven hundred seventy-eight thousand, six hundred twenty-one".