1261230427 has 2 divisors, whose sum is σ = 1261230428. Its totient is φ = 1261230426.

The previous prime is 1261230419. The next prime is 1261230473. The reversal of 1261230427 is 7240321621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1261230427 - 2³ = 1261230419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1261230395 and 1261230404.

It is not a weakly prime, because it can be changed into another prime (1261230727) 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 as a sum of consecutive naturals, namely, 630615213 + 630615214.

It is an arithmetic number, because the mean of its divisors is an integer number (630615214).

Almost surely, 2^1261230427 is an apocalyptic number.

1261230427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261230427 is an equidigital number, since it uses as much as digits as its factorization.

1261230427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1261230427 is about 35513.8061463426. The cubic root of 1261230427 is about 1080.4337612358.

The spelling of 1261230427 in words is "one billion, two hundred sixty-one million, two hundred thirty thousand, four hundred twenty-seven".