1245401453123 has 2 divisors, whose sum is σ = 1245401453124. Its totient is φ = 1245401453122.

The previous prime is 1245401453071. The next prime is 1245401453129. The reversal of 1245401453123 is 3213541045421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1245401453123 - 2¹⁴ = 1245401436739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245401453129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622700726561 + 622700726562.

It is an arithmetic number, because the mean of its divisors is an integer number (622700726562).

Almost surely, 2^{1245401453123} is an apocalyptic number.

1245401453123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245401453123 is an equidigital number, since it uses as much as digits as its factorization.

1245401453123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 1245401453123 its reverse (3213541045421), we get a palindrome (4458942498544).

The spelling of 1245401453123 in words is "one trillion, two hundred forty-five billion, four hundred one million, four hundred fifty-three thousand, one hundred twenty-three".