2421403 has 2 divisors, whose sum is σ = 2421404. Its totient is φ = 2421402.

The previous prime is 2421389. The next prime is 2421407. The reversal of 2421403 is 3041242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2421403 - 2¹³ = 2413211 is a prime.

It is not a weakly prime, because it can be changed into another prime (2421407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210701 + 1210702.

It is an arithmetic number, because the mean of its divisors is an integer number (1210702).

2^2421403 is an apocalyptic number.

2421403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421403 is an equidigital number, since it uses as much as digits as its factorization.

2421403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2421403 is about 1556.0857945499. The cubic root of 2421403 is about 134.2834092277.

Adding to 2421403 its reverse (3041242), we get a palindrome (5462645).

The spelling of 2421403 in words is "two million, four hundred twenty-one thousand, four hundred three".