2120403 has 4 divisors (see below), whose sum is σ = 2827208. Its totient is φ = 1413600.

The previous prime is 2120387. The next prime is 2120411. The reversal of 2120403 is 3040212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2120403 - 2⁴ = 2120387 is a prime.

It is a super-2 number, since 2×2120403² = 8992217764818, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120423) 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, 353398 + ... + 353403.

It is an arithmetic number, because the mean of its divisors is an integer number (706802).

2^2120403 is an apocalyptic number.

2120403 is a deficient number, since it is larger than the sum of its proper divisors (706805).

2120403 is an equidigital number, since it uses as much as digits as its factorization.

2120403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706804.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2120403 is about 1456.1603620481. The cubic root of 2120403 is about 128.4713052957.

Adding to 2120403 its reverse (3040212), we get a palindrome (5160615).

The spelling of 2120403 in words is "two million, one hundred twenty thousand, four hundred three".