1245253123 has 2 divisors, whose sum is σ = 1245253124. Its totient is φ = 1245253122.

The previous prime is 1245253099. The next prime is 1245253133. The reversal of 1245253123 is 3213525421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1245253123 - 2¹⁷ = 1245122051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1245253091 and 1245253100.

It is not a weakly prime, because it can be changed into another prime (1245253133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622626561 + 622626562.

It is an arithmetic number, because the mean of its divisors is an integer number (622626562).

Almost surely, 2^1245253123 is an apocalyptic number.

1245253123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245253123 is an equidigital number, since it uses as much as digits as its factorization.

1245253123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 1245253123 is about 35288.1442272047. The cubic root of 1245253123 is about 1075.8520371046.

Adding to 1245253123 its reverse (3213525421), we get a palindrome (4458778544).

The spelling of 1245253123 in words is "one billion, two hundred forty-five million, two hundred fifty-three thousand, one hundred twenty-three".