13246421 has 2 divisors, whose sum is σ = 13246422. Its totient is φ = 13246420.

The previous prime is 13246411. The next prime is 13246427. The reversal of 13246421 is 12464231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7365796 + 5880625 = 2714^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 13246421 - 2⁶ = 13246357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13246427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6623210 + 6623211.

It is an arithmetic number, because the mean of its divisors is an integer number (6623211).

Almost surely, 2^13246421 is an apocalyptic number.

It is an amenable number.

13246421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13246421 is an equidigital number, since it uses as much as digits as its factorization.

13246421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 13246421 is about 3639.5632979796. The cubic root of 13246421 is about 236.6098669044.

The spelling of 13246421 in words is "thirteen million, two hundred forty-six thousand, four hundred twenty-one".