1267989 has 8 divisors (see below), whose sum is σ = 1714752. Its totient is φ = 833280.

The previous prime is 1267961. The next prime is 1267999. The reversal of 1267989 is 9897621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1267989 - 2⁵ = 1267957 is a prime.

It is a super-2 number, since 2×1267989² = 3215592208242, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1267989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2764 + ... + 3189.

It is an arithmetic number, because the mean of its divisors is an integer number (214344).

2^1267989 is an apocalyptic number.

It is an amenable number.

1267989 is a deficient number, since it is larger than the sum of its proper divisors (446763).

1267989 is an equidigital number, since it uses as much as digits as its factorization.

1267989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6027.

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

The square root of 1267989 is about 1126.0501765019. The cubic root of 1267989 is about 108.2360235979.

The spelling of 1267989 in words is "one million, two hundred sixty-seven thousand, nine hundred eighty-nine".