2121475 has 6 divisors (see below), whose sum is σ = 2630660. Its totient is φ = 1697160.

The previous prime is 2121461. The next prime is 2121479. The reversal of 2121475 is 5741212.

It is a happy number.

It is not a de Polignac number, because 2121475 - 2⁵ = 2121443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42405 + ... + 42454.

2^2121475 is an apocalyptic number.

2121475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2121475 is a deficient number, since it is larger than the sum of its proper divisors (509185).

2121475 is an equidigital number, since it uses as much as digits as its factorization.

2121475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84869 (or 84864 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 2121475 is about 1456.5284068634. The cubic root of 2121475 is about 128.4929518156.

Adding to 2121475 its reverse (5741212), we get a palindrome (7862687).

The spelling of 2121475 in words is "two million, one hundred twenty-one thousand, four hundred seventy-five".