13002421 has 2 divisors, whose sum is σ = 13002422. Its totient is φ = 13002420.

The previous prime is 13002397. The next prime is 13002427. The reversal of 13002421 is 12420031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6682225 + 6320196 = 2585^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 13002421 - 2¹³ = 12994229 is a prime.

It is a super-2 number, since 2×13002421² = 338125903722482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13002427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6501210 + 6501211.

It is an arithmetic number, because the mean of its divisors is an integer number (6501211).

Almost surely, 2^13002421 is an apocalyptic number.

It is an amenable number.

13002421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13002421 is an equidigital number, since it uses as much as digits as its factorization.

13002421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13002421 is about 3605.8869921283. The cubic root of 13002421 is about 235.1480642283.

Adding to 13002421 its reverse (12420031), we get a palindrome (25422452).

It can be divided in two parts, 1300 and 2421, that added together give a square (3721 = 61²).

The spelling of 13002421 in words is "thirteen million, two thousand, four hundred twenty-one".