134721 has 6 divisors (see below), whose sum is σ = 194610. Its totient is φ = 89808.

The previous prime is 134707. The next prime is 134731. The reversal of 134721 is 127431.

It can be written as a sum of positive squares in only one way, i.e., 69696 + 65025 = 264^2 + 255^2 .

It is not a de Polignac number, because 134721 - 2⁷ = 134593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134694 and 134703.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 134721.

It is not an unprimeable number, because it can be changed into a prime (134731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7476 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (32435).

2¹³⁴⁷²¹ is an apocalyptic number.

It is an amenable number.

134721 is a deficient number, since it is larger than the sum of its proper divisors (59889).

134721 is a wasteful number, since it uses less digits than its factorization.

134721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14975 (or 14972 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 134721 is about 367.0435941411. The cubic root of 134721 is about 51.2639145244.

The spelling of 134721 in words is "one hundred thirty-four thousand, seven hundred twenty-one".