1306252431 has 24 divisors (see below), whose sum is σ = 2068816464. Its totient is φ = 787637760.

The previous prime is 1306252421. The next prime is 1306252463. The reversal of 1306252431 is 1342526031.

1306252431 is a `hidden beast` number, since 1 + 3 + 0 + 625 + 2 + 4 + 31 = 666.

It is not a de Polignac number, because 1306252431 - 2⁵ = 1306252399 is a prime.

It is a super-2 number, since 2×1306252431² = 3412590826986819522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1306252395 and 1306252404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306252421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13986 + ... + 52991.

It is an arithmetic number, because the mean of its divisors is an integer number (86200686).

Almost surely, 2^1306252431 is an apocalyptic number.

1306252431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1306252431 is a deficient number, since it is larger than the sum of its proper divisors (762564033).

1306252431 is a wasteful number, since it uses less digits than its factorization.

1306252431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67191 (or 67188 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1306252431 is about 36142.1143681440. The cubic root of 1306252431 is about 1093.1397927812.

Adding to 1306252431 its reverse (1342526031), we get a palindrome (2648778462).

The spelling of 1306252431 in words is "one billion, three hundred six million, two hundred fifty-two thousand, four hundred thirty-one".