13554421 has 4 divisors (see below), whose sum is σ = 13740172. Its totient is φ = 13368672.

The previous prime is 13554419. The next prime is 13554427. The reversal of 13554421 is 12445531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12445531 = 7 ⋅1777933.

It can be written as a sum of positive squares in 2 ways, for example, as 3663396 + 9891025 = 1914^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 13554421 - 2¹ = 13554419 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 (13554427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92766 + ... + 92911.

It is an arithmetic number, because the mean of its divisors is an integer number (3435043).

Almost surely, 2^13554421 is an apocalyptic number.

It is an amenable number.

13554421 is a deficient number, since it is larger than the sum of its proper divisors (185751).

13554421 is an equidigital number, since it uses as much as digits as its factorization.

13554421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185750.

The product of its digits is 2400, while the sum is 25.

The square root of 13554421 is about 3681.6329257545. The cubic root of 13554421 is about 238.4296842026.

Adding to 13554421 its reverse (12445531), we get a palindrome (25999952).

It can be divided in two parts, 1355 and 4421, that added together give a square (5776 = 76²).

The spelling of 13554421 in words is "thirteen million, five hundred fifty-four thousand, four hundred twenty-one".