121715 has 8 divisors (see below), whose sum is σ = 159408. Its totient is φ = 88480.

The previous prime is 121711. The next prime is 121721. The reversal of 121715 is 517121.

121715 = T₉₄ + T₉₅ + ... + T₁₁₅.

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

It is not a de Polignac number, because 121715 - 2² = 121711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121693 and 121702.

It is not an unprimeable number, because it can be changed into a prime (121711) 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, 1052 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (19926).

2¹²¹⁷¹⁵ is an apocalyptic number.

121715 is a deficient number, since it is larger than the sum of its proper divisors (37693).

121715 is a wasteful number, since it uses less digits than its factorization.

121715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229.

The product of its digits is 70, while the sum is 17.

The square root of 121715 is about 348.8767690747. The cubic root of 121715 is about 49.5581061008.

Adding to 121715 its reverse (517121), we get a palindrome (638836).

The spelling of 121715 in words is "one hundred twenty-one thousand, seven hundred fifteen".