1045523007421 has 2 divisors, whose sum is σ = 1045523007422. Its totient is φ = 1045523007420.

The previous prime is 1045523007383. The next prime is 1045523007439. The reversal of 1045523007421 is 1247003255401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943985184921 + 101537822500 = 971589^2 + 318650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045523007421 - 2¹⁵ = 1045522974653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045523047421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522761503710 + 522761503711.

It is an arithmetic number, because the mean of its divisors is an integer number (522761503711).

Almost surely, 2^{1045523007421} is an apocalyptic number.

It is an amenable number.

1045523007421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045523007421 is an equidigital number, since it uses as much as digits as its factorization.

1045523007421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 1045523007421 in words is "one trillion, forty-five billion, five hundred twenty-three million, seven thousand, four hundred twenty-one".