1232505139 has 2 divisors, whose sum is σ = 1232505140. Its totient is φ = 1232505138.

The previous prime is 1232505119. The next prime is 1232505143. The reversal of 1232505139 is 9315052321.

It is a strong prime.

It is an emirp because it is prime and its reverse (9315052321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1232505139 - 2⁷ = 1232505011 is a prime.

It is a super-2 number, since 2×1232505139² = 3038137835322818642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1232505139.

It is not a weakly prime, because it can be changed into another prime (1232505119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616252569 + 616252570.

It is an arithmetic number, because the mean of its divisors is an integer number (616252570).

Almost surely, 2^1232505139 is an apocalyptic number.

1232505139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232505139 is an equidigital number, since it uses as much as digits as its factorization.

1232505139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 1232505139 is about 35107.0525535824. The cubic root of 1232505139 is about 1072.1681773140.

The spelling of 1232505139 in words is "one billion, two hundred thirty-two million, five hundred five thousand, one hundred thirty-nine".