2402121 has 4 divisors (see below), whose sum is σ = 3202832. Its totient is φ = 1601412.

The previous prime is 2402107. The next prime is 2402161. The reversal of 2402121 is 1212042.

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 not a de Polignac number, because 2402121 - 2⁵ = 2402089 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2402097 and 2402106.

It is not an unprimeable number, because it can be changed into a prime (2402161) 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, 400351 + ... + 400356.

It is an arithmetic number, because the mean of its divisors is an integer number (800708).

2^2402121 is an apocalyptic number.

It is an amenable number.

2402121 is a deficient number, since it is larger than the sum of its proper divisors (800711).

2402121 is an equidigital number, since it uses as much as digits as its factorization.

2402121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800710.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2402121 is about 1549.8777371135. The cubic root of 2402121 is about 133.9260191615.

Adding to 2402121 its reverse (1212042), we get a palindrome (3614163).

It can be divided in two parts, 24021 and 21, that added together give a palindrome (24042).

The spelling of 2402121 in words is "two million, four hundred two thousand, one hundred twenty-one".