2015121 has 8 divisors (see below), whose sum is σ = 2828320. Its totient is φ = 1272672.

The previous prime is 2015107. The next prime is 2015141. The reversal of 2015121 is 1215102.

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

It is not a de Polignac number, because 2015121 - 2⁵ = 2015089 is a prime.

It is a Duffinian number.

2015121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2015097 and 2015106.

It is not an unprimeable number, because it can be changed into a prime (2015141) 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, 17620 + ... + 17733.

It is an arithmetic number, because the mean of its divisors is an integer number (353540).

2^2015121 is an apocalyptic number.

It is an amenable number.

2015121 is a deficient number, since it is larger than the sum of its proper divisors (813199).

2015121 is a wasteful number, since it uses less digits than its factorization.

2015121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35375.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 2015121 is about 1419.5495764502. The cubic root of 2015121 is about 126.3088292309.

The spelling of 2015121 in words is "two million, fifteen thousand, one hundred twenty-one".