2121432 has 32 divisors (see below), whose sum is σ = 5449200. Its totient is φ = 687744.

The previous prime is 2121403. The next prime is 2121433. The reversal of 2121432 is 2341212.

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 2082.

2^2121432 is an apocalyptic number.

It is an amenable number.

2121432 is an abundant number, since it is smaller than the sum of its proper divisors (3327768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121432 is a wasteful number, since it uses less digits than its factorization.

2121432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435 (or 2431 counting only the distinct ones).

The product of its digits is 96, while the sum is 15.

The square root of 2121432 is about 1456.5136456621. The cubic root of 2121432 is about 128.4920836721.

Adding to 2121432 its reverse (2341212), we get a palindrome (4462644).

The spelling of 2121432 in words is "two million, one hundred twenty-one thousand, four hundred thirty-two".