2840121 has 6 divisors (see below), whose sum is σ = 4102410. Its totient is φ = 1893408.

The previous prime is 2840119. The next prime is 2840161. The reversal of 2840121 is 1210482.

It can be written as a sum of positive squares in only one way, i.e., 2134521 + 705600 = 1461^2 + 840^2 .

It is not a de Polignac number, because 2840121 - 2¹ = 2840119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2840094 and 2840103.

It is not an unprimeable number, because it can be changed into a prime (2840161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157776 + ... + 157793.

It is an arithmetic number, because the mean of its divisors is an integer number (683735).

2^2840121 is an apocalyptic number.

It is an amenable number.

2840121 is a deficient number, since it is larger than the sum of its proper divisors (1262289).

2840121 is a wasteful number, since it uses less digits than its factorization.

2840121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315575 (or 315572 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2840121 is about 1685.2658543981. The cubic root of 2840121 is about 141.6159861775.

The spelling of 2840121 in words is "two million, eight hundred forty thousand, one hundred twenty-one".