2121315 has 32 divisors (see below), whose sum is σ = 3939840. Its totient is φ = 954624.

The previous prime is 2121289. The next prime is 2121323. The reversal of 2121315 is 5131212.

It is not a de Polignac number, because 2121315 - 2⁷ = 2121187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 2121294 and 2121303.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9232 + ... + 9458.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^2121315 is an apocalyptic number.

2121315 is a deficient number, since it is larger than the sum of its proper divisors (1818525).

2121315 is a wasteful number, since it uses less digits than its factorization.

2121315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its digits is 60, while the sum is 15.

The square root of 2121315 is about 1456.4734807061. The cubic root of 2121315 is about 128.4897214548.

Adding to 2121315 its reverse (5131212), we get a palindrome (7252527).

The spelling of 2121315 in words is "two million, one hundred twenty-one thousand, three hundred fifteen".