1306233253 has 4 divisors (see below), whose sum is σ = 1406712748. Its totient is φ = 1205753760.

The previous prime is 1306233241. The next prime is 1306233287. The reversal of 1306233253 is 3523326031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3523326031 = 3697 ⋅953023.

It can be written as a sum of positive squares in 2 ways, for example, as 828461089 + 477772164 = 28783^2 + 21858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306233253 - 2²¹ = 1304136101 is a prime.

It is a super-2 number, since 2×1306233253² = 3412490622485924018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306233293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50239728 + ... + 50239753.

It is an arithmetic number, because the mean of its divisors is an integer number (351678187).

Almost surely, 2^1306233253 is an apocalyptic number.

1306233253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1306233253 is a deficient number, since it is larger than the sum of its proper divisors (100479495).

1306233253 is a wasteful number, since it uses less digits than its factorization.

1306233253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100479494.

The product of its (nonzero) digits is 9720, while the sum is 28.

The square root of 1306233253 is about 36141.8490534173. The cubic root of 1306233253 is about 1093.1344430400.

Adding to 1306233253 its reverse (3523326031), we get a palindrome (4829559284).

The spelling of 1306233253 in words is "one billion, three hundred six million, two hundred thirty-three thousand, two hundred fifty-three".