2521121 has 4 divisors (see below), whose sum is σ = 2536752. Its totient is φ = 2505492.

The previous prime is 2521111. The next prime is 2521147. The reversal of 2521121 is 1211252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2521121 - 2¹⁴ = 2504737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2521096 and 2521105.

It is not an unprimeable number, because it can be changed into a prime (2521111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7571 + ... + 7896.

It is an arithmetic number, because the mean of its divisors is an integer number (634188).

2^2521121 is an apocalyptic number.

It is an amenable number.

2521121 is a deficient number, since it is larger than the sum of its proper divisors (15631).

2521121 is a wasteful number, since it uses less digits than its factorization.

2521121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15630.

The product of its digits is 40, while the sum is 14.

The square root of 2521121 is about 1587.8038291930. The cubic root of 2521121 is about 136.1020176009.

Adding to 2521121 its sum of digits (14), we get a triangular number (2521135 = T₂₂₄₅).

Adding to 2521121 its reverse (1211252), we get a palindrome (3732373).

The spelling of 2521121 in words is "two million, five hundred twenty-one thousand, one hundred twenty-one".