13849561 has 4 divisors (see below), whose sum is σ = 15108624. Its totient is φ = 12590500.

The previous prime is 13849553. The next prime is 13849571. The reversal of 13849561 is 16594831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16594831 = 11 ⋅1508621.

It is a cyclic number.

It is not a de Polignac number, because 13849561 - 2³ = 13849553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13849561.

It is not an unprimeable number, because it can be changed into a prime (13849531) 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, 629515 + ... + 629536.

It is an arithmetic number, because the mean of its divisors is an integer number (3777156).

Almost surely, 2^13849561 is an apocalyptic number.

13849561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13849561 is a deficient number, since it is larger than the sum of its proper divisors (1259063).

13849561 is a wasteful number, since it uses less digits than its factorization.

13849561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259062.

The product of its digits is 25920, while the sum is 37.

The square root of 13849561 is about 3721.4998320570. The cubic root of 13849561 is about 240.1478313762.

The spelling of 13849561 in words is "thirteen million, eight hundred forty-nine thousand, five hundred sixty-one".