1250364530809 has 3 divisors (see below), whose sum is σ = 1250365649007. Its totient is φ = 1250363412612.

The previous prime is 1250364530777. The next prime is 1250364530813. The reversal of 1250364530809 is 9080354630521.

The square root of 1250364530809 is 1118197.

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 can be written as a sum of positive squares in only one way, i.e., 3059749225 + 1247304781584 = 55315^2 + 1116828^2 .

It is not a de Polignac number, because 1250364530809 - 2⁵ = 1250364530777 is a prime.

It is a super-2 number, since 2×1250364530809² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250364530839) 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, 559099 + ... + 1677295.

It is an arithmetic number, because the mean of its divisors is an integer number (416788549669).

Almost surely, 2^{1250364530809} is an apocalyptic number.

1250364530809 is the 1118197-th square number.

1250364530809 is the 559099-th centered octagonal number.

It is an amenable number.

1250364530809 is a deficient number, since it is larger than the sum of its proper divisors (1118198).

1250364530809 is an frugal number, since it uses more digits than its factorization.

1250364530809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236394 (or 1118197 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 1250364530809 in words is "one trillion, two hundred fifty billion, three hundred sixty-four million, five hundred thirty thousand, eight hundred nine".