2121472 has 18 divisors (see below), whose sum is σ = 4235168. Its totient is φ = 1060608.

The previous prime is 2121461. The next prime is 2121479. The reversal of 2121472 is 2741212.

It is a happy number.

2121472 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

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 (2121479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3888 + ... + 4399.

2^2121472 is an apocalyptic number.

It is an amenable number.

2121472 is a deficient number, since it is larger than the sum of its proper divisors (2113696).

2121472 is an frugal number, since it uses more digits than its factorization.

2121472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8303 (or 8289 counting only the distinct ones).

The product of its digits is 224, while the sum is 19.

The square root of 2121472 is about 1456.5273770170. The cubic root of 2121472 is about 128.4928912478.

Adding to 2121472 its reverse (2741212), we get a palindrome (4862684).

The spelling of 2121472 in words is "two million, one hundred twenty-one thousand, four hundred seventy-two".