1292427089 has 2 divisors, whose sum is σ = 1292427090. Its totient is φ = 1292427088.

The previous prime is 1292427083. The next prime is 1292427161. The reversal of 1292427089 is 9807242921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 880012225 + 412414864 = 29665^2 + 20308^2 .

It is a cyclic number.

It is not a de Polignac number, because 1292427089 - 2²⁰ = 1291378513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1292427083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646213544 + 646213545.

It is an arithmetic number, because the mean of its divisors is an integer number (646213545).

Almost surely, 2^1292427089 is an apocalyptic number.

It is an amenable number.

1292427089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1292427089 is an equidigital number, since it uses as much as digits as its factorization.

1292427089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1292427089 is about 35950.3419872468. The cubic root of 1292427089 is about 1089.2695184207.

The spelling of 1292427089 in words is "one billion, two hundred ninety-two million, four hundred twenty-seven thousand, eighty-nine".