1245716175421 has 2 divisors, whose sum is σ = 1245716175422. Its totient is φ = 1245716175420.

The previous prime is 1245716175397. The next prime is 1245716175533.

1245716175421 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1229071563225 + 16644612196 = 1108635^2 + 129014^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1245716175421 - 2¹³ = 1245716167229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245716176421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622858087710 + 622858087711.

It is an arithmetic number, because the mean of its divisors is an integer number (622858087711).

Almost surely, 2^{1245716175421} is an apocalyptic number.

It is an amenable number.

1245716175421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245716175421 is an equidigital number, since it uses as much as digits as its factorization.

1245716175421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 46.

The spelling of 1245716175421 in words is "one trillion, two hundred forty-five billion, seven hundred sixteen million, one hundred seventy-five thousand, four hundred twenty-one".