1264027489 has 2 divisors, whose sum is σ = 1264027490. Its totient is φ = 1264027488.

The previous prime is 1264027483. The next prime is 1264027529. The reversal of 1264027489 is 9847204621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660490000 + 603537489 = 25700^2 + 24567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264027489 - 2²⁷ = 1129809761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264027483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632013744 + 632013745.

It is an arithmetic number, because the mean of its divisors is an integer number (632013745).

Almost surely, 2^1264027489 is an apocalyptic number.

It is an amenable number.

1264027489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264027489 is an equidigital number, since it uses as much as digits as its factorization.

1264027489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1264027489 is about 35553.1642614269. The cubic root of 1264027489 is about 1081.2318731121.

The spelling of 1264027489 in words is "one billion, two hundred sixty-four million, twenty-seven thousand, four hundred eighty-nine".