2402505421 has 2 divisors, whose sum is σ = 2402505422. Its totient is φ = 2402505420.

The previous prime is 2402505401. The next prime is 2402505449. The reversal of 2402505421 is 1245052042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2402372196 + 133225 = 49014^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2402505421 - 2¹¹ = 2402503373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2402505401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1201252710 + 1201252711.

It is an arithmetic number, because the mean of its divisors is an integer number (1201252711).

Almost surely, 2^2402505421 is an apocalyptic number.

It is an amenable number.

2402505421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2402505421 is an equidigital number, since it uses as much as digits as its factorization.

2402505421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2402505421 is about 49015.3590316342. The cubic root of 2402505421 is about 1339.3316301870.

Adding to 2402505421 its reverse (1245052042), we get a palindrome (3647557463).

The spelling of 2402505421 in words is "two billion, four hundred two million, five hundred five thousand, four hundred twenty-one".