13249881 has 6 divisors (see below), whose sum is σ = 19138730. Its totient is φ = 8833248.

The previous prime is 13249879. The next prime is 13249883. The reversal of 13249881 is 18894231.

13249881 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13249879) and next prime (13249883).

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 2752281 = 3240^2 + 1659^2 .

It is not a de Polignac number, because 13249881 - 2¹ = 13249879 is a prime.

It is a super-2 number, since 2×13249881² = 351118693028322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13249883) 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, 736096 + ... + 736113.

Almost surely, 2^13249881 is an apocalyptic number.

It is an amenable number.

13249881 is a deficient number, since it is larger than the sum of its proper divisors (5888849).

13249881 is a wasteful number, since it uses less digits than its factorization.

13249881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472215 (or 1472212 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 13249881 is about 3640.0385986964. The cubic root of 13249881 is about 236.6304661508.

The spelling of 13249881 in words is "thirteen million, two hundred forty-nine thousand, eight hundred eighty-one".