123512447 has 2 divisors, whose sum is σ = 123512448. Its totient is φ = 123512446.

The previous prime is 123512443. The next prime is 123512449. The reversal of 123512447 is 744215321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123512447 - 2² = 123512443 is a prime.

Together with 123512449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123512443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61756223 + 61756224.

It is an arithmetic number, because the mean of its divisors is an integer number (61756224).

Almost surely, 2^123512447 is an apocalyptic number.

123512447 is a deficient number, since it is larger than the sum of its proper divisors (1).

123512447 is an equidigital number, since it uses as much as digits as its factorization.

123512447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 123512447 is about 11113.6153883424. The cubic root of 123512447 is about 498.0086757842.

Adding to 123512447 its reverse (744215321), we get a palindrome (867727768).

The spelling of 123512447 in words is "one hundred twenty-three million, five hundred twelve thousand, four hundred forty-seven".