2121535 has 16 divisors (see below), whose sum is σ = 2774016. Its totient is φ = 1548288.

The previous prime is 2121529. The next prime is 2121569. The reversal of 2121535 is 5351212.

It is a cyclic number.

It is not a de Polignac number, because 2121535 - 2⁵ = 2121503 is a prime.

It is a Duffinian number.

2121535 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8127 + ... + 8383.

It is an arithmetic number, because the mean of its divisors is an integer number (173376).

2^2121535 is an apocalyptic number.

2121535 is a deficient number, since it is larger than the sum of its proper divisors (652481).

2121535 is a wasteful number, since it uses less digits than its factorization.

2121535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402.

The product of its digits is 300, while the sum is 19.

The square root of 2121535 is about 1456.5490036384. The cubic root of 2121535 is about 128.4941631590.

Adding to 2121535 its reverse (5351212), we get a palindrome (7472747).

The spelling of 2121535 in words is "two million, one hundred twenty-one thousand, five hundred thirty-five".