13552861 has 6 divisors (see below), whose sum is σ = 15765630. Its totient is φ = 11616696.

The previous prime is 13552853. The next prime is 13552879. The reversal of 13552861 is 16825531.

It can be written as a sum of positive squares in only one way, i.e., 9572836 + 3980025 = 3094^2 + 1995^2 .

It is not a de Polignac number, because 13552861 - 2³ = 13552853 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 (13552811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138246 + ... + 138343.

It is an arithmetic number, because the mean of its divisors is an integer number (2627605).

Almost surely, 2^13552861 is an apocalyptic number.

It is an amenable number.

13552861 is a deficient number, since it is larger than the sum of its proper divisors (2212769).

13552861 is an equidigital number, since it uses as much as digits as its factorization.

13552861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276603 (or 276596 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 13552861 is about 3681.4210571463. The cubic root of 13552861 is about 238.4205367670.

The spelling of 13552861 in words is "thirteen million, five hundred fifty-two thousand, eight hundred sixty-one".