1267979 has 4 divisors (see below), whose sum is σ = 1342584. Its totient is φ = 1193376.

The previous prime is 1267961. The next prime is 1267999. The reversal of 1267979 is 9797621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1267979 - 2⁸ = 1267723 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 37277 + ... + 37310.

It is an arithmetic number, because the mean of its divisors is an integer number (335646).

2^1267979 is an apocalyptic number.

1267979 is a deficient number, since it is larger than the sum of its proper divisors (74605).

1267979 is an equidigital number, since it uses as much as digits as its factorization.

1267979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74604.

The product of its digits is 47628, while the sum is 41.

The square root of 1267979 is about 1126.0457361937. The cubic root of 1267979 is about 108.2357390626.

The spelling of 1267979 in words is "one million, two hundred sixty-seven thousand, nine hundred seventy-nine".