13561365 has 16 divisors (see below), whose sum is σ = 22228416. Its totient is φ = 7056000.

The previous prime is 13561363. The next prime is 13561367. The reversal of 13561365 is 56316531.

13561365 = 555² + 556² + ... + 595².

It is an interprime number because it is at equal distance from previous prime (13561363) and next prime (13561367).

It is not a de Polignac number, because 13561365 - 2¹ = 13561363 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 (13561363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10411 + ... + 11640.

It is an arithmetic number, because the mean of its divisors is an integer number (1389276).

Almost surely, 2^13561365 is an apocalyptic number.

13561365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13561365 is a deficient number, since it is larger than the sum of its proper divisors (8667051).

13561365 is a wasteful number, since it uses less digits than its factorization.

13561365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100.

The product of its digits is 8100, while the sum is 30.

The square root of 13561365 is about 3682.5758647990. The cubic root of 13561365 is about 238.4703935051.

Adding to 13561365 its reverse (56316531), we get a palindrome (69877896).

The spelling of 13561365 in words is "thirteen million, five hundred sixty-one thousand, three hundred sixty-five".