134405217 has 8 divisors (see below), whose sum is σ = 199118880. Its totient is φ = 89603460.

The previous prime is 134405203. The next prime is 134405231. The reversal of 134405217 is 712504431.

134405217 is a `hidden beast` number, since 1 + 3 + 440 + 5 + 217 = 666.

It is an interprime number because it is at equal distance from previous prime (134405203) and next prime (134405231).

It is not a de Polignac number, because 134405217 - 2¹⁴ = 134388833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4977971 = 134405217 / (1 + 3 + 4 + 4 + 0 + 5 + 2 + 1 + 7).

It is not an unprimeable number, because it can be changed into a prime (134405287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2488959 + ... + 2489012.

It is an arithmetic number, because the mean of its divisors is an integer number (24889860).

Almost surely, 2^134405217 is an apocalyptic number.

It is an amenable number.

134405217 is a deficient number, since it is larger than the sum of its proper divisors (64713663).

134405217 is an equidigital number, since it uses as much as digits as its factorization.

134405217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4977980 (or 4977974 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 134405217 is about 11593.3263992695. The cubic root of 134405217 is about 512.2382936687.

Adding to 134405217 its reverse (712504431), we get a palindrome (846909648).

The spelling of 134405217 in words is "one hundred thirty-four million, four hundred five thousand, two hundred seventeen".