1260138431 has 2 divisors, whose sum is σ = 1260138432. Its totient is φ = 1260138430.

The previous prime is 1260138409. The next prime is 1260138433. The reversal of 1260138431 is 1348310621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1260138431 - 2⁶ = 1260138367 is a prime.

It is a super-2 number, since 2×1260138431² = 3175897730566283522, which contains 22 as substring.

Together with 1260138433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1260138394 and 1260138403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260138433) 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 as a sum of consecutive naturals, namely, 630069215 + 630069216.

It is an arithmetic number, because the mean of its divisors is an integer number (630069216).

Almost surely, 2^1260138431 is an apocalyptic number.

1260138431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260138431 is an equidigital number, since it uses as much as digits as its factorization.

1260138431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1260138431 is about 35498.4285708537. The cubic root of 1260138431 is about 1080.1218515350.

The spelling of 1260138431 in words is "one billion, two hundred sixty million, one hundred thirty-eight thousand, four hundred thirty-one".