115421749 has 2 divisors, whose sum is σ = 115421750. Its totient is φ = 115421748.

The previous prime is 115421743. The next prime is 115421849. The reversal of 115421749 is 947124511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80102500 + 35319249 = 8950^2 + 5943^2 .

It is an emirp because it is prime and its reverse (947124511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115421749 - 2¹¹ = 115419701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115421743) 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, 57710874 + 57710875.

It is an arithmetic number, because the mean of its divisors is an integer number (57710875).

Almost surely, 2^115421749 is an apocalyptic number.

It is an amenable number.

115421749 is a deficient number, since it is larger than the sum of its proper divisors (1).

115421749 is an equidigital number, since it uses as much as digits as its factorization.

115421749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 115421749 is about 10743.4514472771. The cubic root of 115421749 is about 486.8881637541. Note that the first 3 decimals are identical.

The spelling of 115421749 in words is "one hundred fifteen million, four hundred twenty-one thousand, seven hundred forty-nine".