2415921 has 16 divisors (see below), whose sum is σ = 3446784. Its totient is φ = 1499904.

The previous prime is 2415913. The next prime is 2415937. The reversal of 2415921 is 1295142.

2415921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2415921 - 2³ = 2415913 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2415891 and 2415900.

It is not an unprimeable number, because it can be changed into a prime (2415221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6291 + ... + 6663.

It is an arithmetic number, because the mean of its divisors is an integer number (215424).

2^2415921 is an apocalyptic number.

It is an amenable number.

2415921 is a deficient number, since it is larger than the sum of its proper divisors (1030863).

2415921 is a wasteful number, since it uses less digits than its factorization.

2415921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520.

The product of its digits is 720, while the sum is 24.

The square root of 2415921 is about 1554.3233254378. The cubic root of 2415921 is about 134.1819944852.

The spelling of 2415921 in words is "two million, four hundred fifteen thousand, nine hundred twenty-one".