1252223165 has 4 divisors (see below), whose sum is σ = 1502667804. Its totient is φ = 1001778528.

The previous prime is 1252223143. The next prime is 1252223171. The reversal of 1252223165 is 5613222521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 389391289 + 862831876 = 19733^2 + 29374^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252223165 - 2¹⁶ = 1252157629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125222312 + ... + 125222321.

It is an arithmetic number, because the mean of its divisors is an integer number (375666951).

Almost surely, 2^1252223165 is an apocalyptic number.

It is an amenable number.

1252223165 is a deficient number, since it is larger than the sum of its proper divisors (250444639).

1252223165 is an equidigital number, since it uses as much as digits as its factorization.

1252223165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250444638.

The product of its digits is 7200, while the sum is 29.

The square root of 1252223165 is about 35386.7653932936. The cubic root of 1252223165 is about 1077.8555886261.

Adding to 1252223165 its reverse (5613222521), we get a palindrome (6865445686).

The spelling of 1252223165 in words is "one billion, two hundred fifty-two million, two hundred twenty-three thousand, one hundred sixty-five".