15242861 has 2 divisors, whose sum is σ = 15242862. Its totient is φ = 15242860.

The previous prime is 15242839. The next prime is 15242869. The reversal of 15242861 is 16824251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13920361 + 1322500 = 3731^2 + 1150^2 .

It is an emirp because it is prime and its reverse (16824251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15242861 - 2⁶ = 15242797 is a prime.

It is a super-2 number, since 2×15242861² = 464689622930642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15242869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621430 + 7621431.

It is an arithmetic number, because the mean of its divisors is an integer number (7621431).

Almost surely, 2^15242861 is an apocalyptic number.

It is an amenable number.

15242861 is a deficient number, since it is larger than the sum of its proper divisors (1).

15242861 is an equidigital number, since it uses as much as digits as its factorization.

15242861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 15242861 is about 3904.2106756680. The cubic root of 15242861 is about 247.9450808412.

The spelling of 15242861 in words is "fifteen million, two hundred forty-two thousand, eight hundred sixty-one".