1252446521 has 2 divisors, whose sum is σ = 1252446522. Its totient is φ = 1252446520.

The previous prime is 1252446497. The next prime is 1252446529. The reversal of 1252446521 is 1256442521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704371600 + 548074921 = 26540^2 + 23411^2 .

It is an emirp because it is prime and its reverse (1256442521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1252446521 - 2¹⁰ = 1252445497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1252446529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626223260 + 626223261.

It is an arithmetic number, because the mean of its divisors is an integer number (626223261).

Almost surely, 2^1252446521 is an apocalyptic number.

It is an amenable number.

1252446521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252446521 is an equidigital number, since it uses as much as digits as its factorization.

1252446521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 32.

The square root of 1252446521 is about 35389.9211782112. The cubic root of 1252446521 is about 1077.9196696428.

The spelling of 1252446521 in words is "one billion, two hundred fifty-two million, four hundred forty-six thousand, five hundred twenty-one".