171613121 has 8 divisors (see below), whose sum is σ = 176027904. Its totient is φ = 167230240.

The previous prime is 171613109. The next prime is 171613133. The reversal of 171613121 is 121316171.

It is a happy number.

171613121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (171613109) and next prime (171613133).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171613121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171613621) 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, 3116 + ... + 18786.

It is an arithmetic number, because the mean of its divisors is an integer number (22003488).

Almost surely, 2^171613121 is an apocalyptic number.

It is an amenable number.

171613121 is a deficient number, since it is larger than the sum of its proper divisors (4414783).

171613121 is a wasteful number, since it uses less digits than its factorization.

171613121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15951.

The product of its digits is 252, while the sum is 23.

The square root of 171613121 is about 13100.1191215958. The cubic root of 171613121 is about 555.7124967112.

Adding to 171613121 its reverse (121316171), we get a palindrome (292929292).

The spelling of 171613121 in words is "one hundred seventy-one million, six hundred thirteen thousand, one hundred twenty-one".