13416021 has 6 divisors (see below), whose sum is σ = 19378710. Its totient is φ = 8944008.

The previous prime is 13416019. The next prime is 13416023. The reversal of 13416021 is 12061431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13416019) and next prime (13416023).

It can be written as a sum of positive squares in only one way, i.e., 13176900 + 239121 = 3630^2 + 489^2 .

It is not a de Polignac number, because 13416021 - 2¹ = 13416019 is a prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13415985 and 13416003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13416023) 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 in 5 ways as a sum of consecutive naturals, for example, 745326 + ... + 745343.

It is an arithmetic number, because the mean of its divisors is an integer number (3229785).

Almost surely, 2^13416021 is an apocalyptic number.

It is an amenable number.

13416021 is a deficient number, since it is larger than the sum of its proper divisors (5962689).

13416021 is a wasteful number, since it uses less digits than its factorization.

13416021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490675 (or 1490672 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 13416021 is about 3662.7886916938. The cubic root of 13416021 is about 237.6153958156.

Adding to 13416021 its reverse (12061431), we get a palindrome (25477452).

The spelling of 13416021 in words is "thirteen million, four hundred sixteen thousand, twenty-one".