1289265 has 32 divisors (see below), whose sum is σ = 2232576. Its totient is φ = 633600.

The previous prime is 1289261. The next prime is 1289273. The reversal of 1289265 is 5629821.

It is not a de Polignac number, because 1289265 - 2² = 1289261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1289261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12715 + ... + 12815.

It is an arithmetic number, because the mean of its divisors is an integer number (69768).

2^1289265 is an apocalyptic number.

1289265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1289265 is a deficient number, since it is larger than the sum of its proper divisors (943311).

1289265 is a wasteful number, since it uses less digits than its factorization.

1289265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169.

The product of its digits is 8640, while the sum is 33.

The square root of 1289265 is about 1135.4580573495. The cubic root of 1289265 is about 108.8380446987.

The spelling of 1289265 in words is "one million, two hundred eighty-nine thousand, two hundred sixty-five".