123271249 has 2 divisors, whose sum is σ = 123271250. Its totient is φ = 123271248.

The previous prime is 123271243. The next prime is 123271273. The reversal of 123271249 is 942172321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64641600 + 58629649 = 8040^2 + 7657^2 .

It is an emirp because it is prime and its reverse (942172321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123271249 - 2³ = 123271241 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 123271249.

It is not a weakly prime, because it can be changed into another prime (123271241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61635624 + 61635625.

It is an arithmetic number, because the mean of its divisors is an integer number (61635625).

Almost surely, 2^123271249 is an apocalyptic number.

It is an amenable number.

123271249 is a deficient number, since it is larger than the sum of its proper divisors (1).

123271249 is an equidigital number, since it uses as much as digits as its factorization.

123271249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 123271249 is about 11102.7586211716. The cubic root of 123271249 is about 497.6842902003.

The spelling of 123271249 in words is "one hundred twenty-three million, two hundred seventy-one thousand, two hundred forty-nine".