2543121 has 24 divisors (see below), whose sum is σ = 4315584. Its totient is φ = 1412640.

The previous prime is 2543117. The next prime is 2543129. The reversal of 2543121 is 1213452.

2543121 is a `hidden beast` number, since 2 + 543 + 121 = 666.

It is not a de Polignac number, because 2543121 - 2² = 2543117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2543094 and 2543103.

It is not an unprimeable number, because it can be changed into a prime (2543129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1786 + ... + 2876.

It is an arithmetic number, because the mean of its divisors is an integer number (179816).

2^2543121 is an apocalyptic number.

2543121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2543121 is a deficient number, since it is larger than the sum of its proper divisors (1772463).

2543121 is a wasteful number, since it uses less digits than its factorization.

2543121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1138 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2543121 is about 1594.7165892409. The cubic root of 2543121 is about 136.4967595737.

Adding to 2543121 its reverse (1213452), we get a palindrome (3756573).

It can be divided in two parts, 25431 and 21, that added together give a palindrome (25452).

The spelling of 2543121 in words is "two million, five hundred forty-three thousand, one hundred twenty-one".