13576421 has 4 divisors (see below), whose sum is σ = 14375052. Its totient is φ = 12777792.

The previous prime is 13576403. The next prime is 13576439. The reversal of 13576421 is 12467531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12467531 = 967 ⋅12893.

It is an interprime number because it is at equal distance from previous prime (13576403) and next prime (13576439).

It can be written as a sum of positive squares in 2 ways, for example, as 5085025 + 8491396 = 2255^2 + 2914^2 .

It is a cyclic number.

It is not a de Polignac number, because 13576421 - 2¹⁴ = 13560037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13576441) 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 3 ways as a sum of consecutive naturals, for example, 399290 + ... + 399323.

It is an arithmetic number, because the mean of its divisors is an integer number (3593763).

Almost surely, 2^13576421 is an apocalyptic number.

It is an amenable number.

13576421 is a deficient number, since it is larger than the sum of its proper divisors (798631).

13576421 is an equidigital number, since it uses as much as digits as its factorization.

13576421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798630.

The product of its digits is 5040, while the sum is 29.

The square root of 13576421 is about 3684.6195190277. The cubic root of 13576421 is about 238.5586118213.

The spelling of 13576421 in words is "thirteen million, five hundred seventy-six thousand, four hundred twenty-one".