2421135 has 24 divisors (see below), whose sum is σ = 4234464. Its totient is φ = 1279680.

The previous prime is 2421119. The next prime is 2421137. The reversal of 2421135 is 5311242.

It is a Cunningham number, because it is equal to 1556²-1.

It is not a de Polignac number, because 2421135 - 2⁴ = 2421119 is a prime.

2421135 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421137) 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, 7630 + ... + 7940.

It is an arithmetic number, because the mean of its divisors is an integer number (176436).

2^2421135 is an apocalyptic number.

2421135 is a deficient number, since it is larger than the sum of its proper divisors (1813329).

2421135 is a wasteful number, since it uses less digits than its factorization.

2421135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 492 counting only the distinct ones).

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

The square root of 2421135 is about 1555.9996786632. Note that the first 3 decimals coincide. The cubic root of 2421135 is about 134.2784548987.

Adding to 2421135 its reverse (5311242), we get a palindrome (7732377).

It can be divided in two parts, 2421 and 135, that added together give a triangular number (2556 = T₇₁).

The spelling of 2421135 in words is "two million, four hundred twenty-one thousand, one hundred thirty-five".