13762561 has 4 divisors (see below), whose sum is σ = 13770324. Its totient is φ = 13754800.

The previous prime is 13762549. The next prime is 13762591. The reversal of 13762561 is 16526731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8673025 + 5089536 = 2945^2 + 2256^2 .

It is a cyclic number.

It is not a de Polignac number, because 13762561 - 2⁷ = 13762433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13762531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231 + ... + 5251.

It is an arithmetic number, because the mean of its divisors is an integer number (3442581).

It is a Proth number, since it is equal to 105 ⋅ 2¹⁷ + 1 and 105 < 2¹⁷.

Almost surely, 2^13762561 is an apocalyptic number.

It is an amenable number.

13762561 is a deficient number, since it is larger than the sum of its proper divisors (7763).

13762561 is an equidigital number, since it uses as much as digits as its factorization.

13762561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7762.

The product of its digits is 7560, while the sum is 31.

The square root of 13762561 is about 3709.7925818029. The cubic root of 13762561 is about 239.6439221952.

The spelling of 13762561 in words is "thirteen million, seven hundred sixty-two thousand, five hundred sixty-one".