123145259 has 2 divisors, whose sum is σ = 123145260. Its totient is φ = 123145258.

The previous prime is 123145193. The next prime is 123145261. The reversal of 123145259 is 952541321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123145259 is a prime.

Together with 123145261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123145559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61572629 + 61572630.

It is an arithmetic number, because the mean of its divisors is an integer number (61572630).

Almost surely, 2^123145259 is an apocalyptic number.

123145259 is a deficient number, since it is larger than the sum of its proper divisors (1).

123145259 is an equidigital number, since it uses as much as digits as its factorization.

123145259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 123145259 is about 11097.0833555489. The cubic root of 123145259 is about 497.5146788258.

The spelling of 123145259 in words is "one hundred twenty-three million, one hundred forty-five thousand, two hundred fifty-nine".