1305425123 has 2 divisors, whose sum is σ = 1305425124. Its totient is φ = 1305425122.

The previous prime is 1305425081. The next prime is 1305425129. The reversal of 1305425123 is 3215245031.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1305425123 - 2⁸ = 1305424867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1305425092 and 1305425101.

It is not a weakly prime, because it can be changed into another prime (1305425129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652712561 + 652712562.

It is an arithmetic number, because the mean of its divisors is an integer number (652712562).

Almost surely, 2^1305425123 is an apocalyptic number.

1305425123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305425123 is an equidigital number, since it uses as much as digits as its factorization.

1305425123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1305425123 is about 36130.6673478362. The cubic root of 1305425123 is about 1092.9089659604.

The spelling of 1305425123 in words is "one billion, three hundred five million, four hundred twenty-five thousand, one hundred twenty-three".