13250421 has 24 divisors (see below), whose sum is σ = 19819800. Its totient is φ = 8524800.

The previous prime is 13250411. The next prime is 13250443. The reversal of 13250421 is 12405231.

13250421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8100 + 13242321 = 90^2 + 3639^2 .

It is not a de Polignac number, because 13250421 - 2⁶ = 13250357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13250394 and 13250403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13250411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54861 + ... + 55101.

It is an arithmetic number, because the mean of its divisors is an integer number (825825).

Almost surely, 2^13250421 is an apocalyptic number.

It is an amenable number.

13250421 is a deficient number, since it is larger than the sum of its proper divisors (6569379).

13250421 is a wasteful number, since it uses less digits than its factorization.

13250421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13250421 is about 3640.1127729783. The cubic root of 13250421 is about 236.6336807385.

Adding to 13250421 its reverse (12405231), we get a palindrome (25655652).

The spelling of 13250421 in words is "thirteen million, two hundred fifty thousand, four hundred twenty-one".