123512449 has 2 divisors, whose sum is σ = 123512450. Its totient is φ = 123512448.

The previous prime is 123512447. The next prime is 123512489. The reversal of 123512449 is 944215321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 51940849 = 8460^2 + 7207^2 .

It is a cyclic number.

It is not a de Polignac number, because 123512449 - 2¹ = 123512447 is a prime.

Together with 123512447, it forms a pair of twin primes.

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 123512449.

It is not a weakly prime, because it can be changed into another prime (123512443) 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, 61756224 + 61756225.

It is an arithmetic number, because the mean of its divisors is an integer number (61756225).

Almost surely, 2^123512449 is an apocalyptic number.

It is an amenable number.

123512449 is a deficient number, since it is larger than the sum of its proper divisors (1).

123512449 is an equidigital number, since it uses as much as digits as its factorization.

123512449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 123512449 is about 11113.6154783221. The cubic root of 123512449 is about 498.0086784722.

The spelling of 123512449 in words is "one hundred twenty-three million, five hundred twelve thousand, four hundred forty-nine".