1274521328809 has 3 divisors (see below), whose sum is σ = 1274522457757. Its totient is φ = 1274520199862.

The previous prime is 1274521328797. The next prime is 1274521328813. The reversal of 1274521328809 is 9088231254721.

The square root of 1274521328809 is 1128947.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1274521328809 - 2⁷ = 1274521328681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1274521328849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 564474 + ... + 1693420.

Almost surely, 2^{1274521328809} is an apocalyptic number.

1274521328809 is the 1128947-th square number.

1274521328809 is the 564474-th centered octagonal number.

It is an amenable number.

1274521328809 is a deficient number, since it is larger than the sum of its proper divisors (1128948).

1274521328809 is an frugal number, since it uses more digits than its factorization.

1274521328809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257894 (or 1128947 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 1274521328809 in words is "one trillion, two hundred seventy-four billion, five hundred twenty-one million, three hundred twenty-eight thousand, eight hundred nine".