15244861 has 2 divisors, whose sum is σ = 15244862. Its totient is φ = 15244860.

The previous prime is 15244843. The next prime is 15244871. The reversal of 15244861 is 16844251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7873636 + 7371225 = 2806^2 + 2715^2 .

It is an emirp because it is prime and its reverse (16844251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15244861 - 2⁵ = 15244829 is a prime.

It is equal to p₉₈₅₅₀₄ and since 15244861 and 985504 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15244841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7622430 + 7622431.

It is an arithmetic number, because the mean of its divisors is an integer number (7622431).

Almost surely, 2^15244861 is an apocalyptic number.

It is an amenable number.

15244861 is a deficient number, since it is larger than the sum of its proper divisors (1).

15244861 is an equidigital number, since it uses as much as digits as its factorization.

15244861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 31.

The square root of 15244861 is about 3904.4668009858. The cubic root of 15244861 is about 247.9559245727.

The spelling of 15244861 in words is "fifteen million, two hundred forty-four thousand, eight hundred sixty-one".