13861261 has 6 divisors (see below), whose sum is σ = 14045262. Its totient is φ = 13679640.

The previous prime is 13861229. The next prime is 13861303. The reversal of 13861261 is 16216831.

It can be written as a sum of positive squares in only one way, i.e., 12638025 + 1223236 = 3555^2 + 1106^2 .

It is not a de Polignac number, because 13861261 - 2⁵ = 13861229 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 (13861201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5131 + ... + 7351.

It is an arithmetic number, because the mean of its divisors is an integer number (2340877).

Almost surely, 2^13861261 is an apocalyptic number.

It is an amenable number.

13861261 is a deficient number, since it is larger than the sum of its proper divisors (184001).

13861261 is an frugal number, since it uses more digits than its factorization.

13861261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379 (or 2300 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 13861261 is about 3723.0714470716. The cubic root of 13861261 is about 240.2154373406.

The spelling of 13861261 in words is "thirteen million, eight hundred sixty-one thousand, two hundred sixty-one".