1245802245761 has 2 divisors, whose sum is σ = 1245802245762. Its totient is φ = 1245802245760.

The previous prime is 1245802245757. The next prime is 1245802245841. The reversal of 1245802245761 is 1675422085421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630920433025 + 614881812736 = 794305^2 + 784144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245802245761 - 2² = 1245802245757 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245805245761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622901122880 + 622901122881.

It is an arithmetic number, because the mean of its divisors is an integer number (622901122881).

Almost surely, 2^{1245802245761} is an apocalyptic number.

It is an amenable number.

1245802245761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245802245761 is an equidigital number, since it uses as much as digits as its factorization.

1245802245761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 1245802245761 in words is "one trillion, two hundred forty-five billion, eight hundred two million, two hundred forty-five thousand, seven hundred sixty-one".