1267428 has 12 divisors (see below), whose sum is σ = 2957360. Its totient is φ = 422472.

The previous prime is 1267411. The next prime is 1267429. The reversal of 1267428 is 8247621.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1267395 and 1267404.

It is not an unprimeable number, because it can be changed into a prime (1267429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52798 + ... + 52821.

2^1267428 is an apocalyptic number.

It is an amenable number.

1267428 is an abundant number, since it is smaller than the sum of its proper divisors (1689932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1267428 is a wasteful number, since it uses less digits than its factorization.

1267428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105626 (or 105624 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 1267428 is about 1125.8010481431. The cubic root of 1267428 is about 108.2200588521.

The spelling of 1267428 in words is "one million, two hundred sixty-seven thousand, four hundred twenty-eight".