2409021 has 10 divisors (see below), whose sum is σ = 3598782. Its totient is φ = 1605960.

The previous prime is 2408999. The next prime is 2409023. The reversal of 2409021 is 1209042.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 68121 = 1530^2 + 261^2 .

It is not a de Polignac number, because 2409021 - 2⁶ = 2408957 is a prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 2408985 and 2409003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2409023) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14790 + ... + 14951.

2^2409021 is an apocalyptic number.

It is an amenable number.

2409021 is a deficient number, since it is larger than the sum of its proper divisors (1189761).

2409021 is an equidigital number, since it uses as much as digits as its factorization.

2409021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29753 (or 29744 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2409021 is about 1552.1021229288. The cubic root of 2409021 is about 134.0541290191.

It can be divided in two parts, 240 and 9021, that added together give a cube (9261 = 21³).

The spelling of 2409021 in words is "two million, four hundred nine thousand, twenty-one".