1289967 has 32 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 673920.

The previous prime is 1289963. The next prime is 1289969. The reversal of 1289967 is 7699821.

It is not a de Polignac number, because 1289967 - 2² = 1289963 is a prime.

It is a super-2 number, since 2×1289967² = 3328029722178, which contains 22 as substring.

1289967 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289963) 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, 21117 + ... + 21177.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2^1289967 is an apocalyptic number.

1289967 is a deficient number, since it is larger than the sum of its proper divisors (852753).

1289967 is a wasteful number, since it uses less digits than its factorization.

1289967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143.

The product of its digits is 54432, while the sum is 42.

The square root of 1289967 is about 1135.7671416272. The cubic root of 1289967 is about 108.8577950847.

The spelling of 1289967 in words is "one million, two hundred eighty-nine thousand, nine hundred sixty-seven".