2121503 has 2 divisors, whose sum is σ = 2121504. Its totient is φ = 2121502.

The previous prime is 2121479. The next prime is 2121529. The reversal of 2121503 is 3051212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121503 - 2¹⁴ = 2105119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060751 + 1060752.

It is an arithmetic number, because the mean of its divisors is an integer number (1060752).

2^2121503 is an apocalyptic number.

2121503 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121503 is an equidigital number, since it uses as much as digits as its factorization.

2121503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2121503 is about 1456.5380187280. The cubic root of 2121503 is about 128.4935171120.

Adding to 2121503 its reverse (3051212), we get a palindrome (5172715).

The spelling of 2121503 in words is "two million, one hundred twenty-one thousand, five hundred three".