15065861 has 2 divisors, whose sum is σ = 15065862. Its totient is φ = 15065860.

The previous prime is 15065857. The next prime is 15065881. The reversal of 15065861 is 16856051.

It is a happy number.

15065861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7672900 + 7392961 = 2770^2 + 2719^2 .

It is an emirp because it is prime and its reverse (16856051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15065861 - 2² = 15065857 is a prime.

It is a super-5 number, since 5×15065861⁵ (a number of 37 digits) contains 55555 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15065801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7532930 + 7532931.

It is an arithmetic number, because the mean of its divisors is an integer number (7532931).

Almost surely, 2^15065861 is an apocalyptic number.

It is an amenable number.

15065861 is a deficient number, since it is larger than the sum of its proper divisors (1).

15065861 is an equidigital number, since it uses as much as digits as its factorization.

15065861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 15065861 is about 3881.4766519973. The cubic root of 15065861 is about 246.9816297592.

The spelling of 15065861 in words is "fifteen million, sixty-five thousand, eight hundred sixty-one".