15448861 has 2 divisors, whose sum is σ = 15448862. Its totient is φ = 15448860.

The previous prime is 15448837. The next prime is 15448871. The reversal of 15448861 is 16884451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13505625 + 1943236 = 3675^2 + 1394^2 .

It is a cyclic number.

It is not a de Polignac number, because 15448861 - 2¹⁷ = 15317789 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15448861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15448871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7724430 + 7724431.

It is an arithmetic number, because the mean of its divisors is an integer number (7724431).

Almost surely, 2^15448861 is an apocalyptic number.

It is an amenable number.

15448861 is a deficient number, since it is larger than the sum of its proper divisors (1).

15448861 is an equidigital number, since it uses as much as digits as its factorization.

15448861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 37.

The square root of 15448861 is about 3930.5039117141. The cubic root of 15448861 is about 249.0570397758.

The spelling of 15448861 in words is "fifteen million, four hundred forty-eight thousand, eight hundred sixty-one".