13851261 has 6 divisors (see below), whose sum is σ = 20007390. Its totient is φ = 9234168.

The previous prime is 13851217. The next prime is 13851263. The reversal of 13851261 is 16215831.

It can be written as a sum of positive squares in only one way, i.e., 12425625 + 1425636 = 3525^2 + 1194^2 .

It is not a de Polignac number, because 13851261 - 2¹⁸ = 13589117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13851263) 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, 769506 + ... + 769523.

It is an arithmetic number, because the mean of its divisors is an integer number (3334565).

Almost surely, 2^13851261 is an apocalyptic number.

It is an amenable number.

13851261 is a deficient number, since it is larger than the sum of its proper divisors (6156129).

13851261 is a wasteful number, since it uses less digits than its factorization.

13851261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539035 (or 1539032 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 13851261 is about 3721.7282275846. The cubic root of 13851261 is about 240.1576568287.

The spelling of 13851261 in words is "thirteen million, eight hundred fifty-one thousand, two hundred sixty-one".