1267421 has 4 divisors (see below), whose sum is σ = 1285344. Its totient is φ = 1249500.

The previous prime is 1267411. The next prime is 1267429. The reversal of 1267421 is 1247621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1267421 - 2¹⁴ = 1251037 is a prime.

It is a Duffinian number.

It is a Curzon 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 (1267429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8855 + ... + 8996.

It is an arithmetic number, because the mean of its divisors is an integer number (321336).

2^1267421 is an apocalyptic number.

It is an amenable number.

1267421 is a deficient number, since it is larger than the sum of its proper divisors (17923).

1267421 is an equidigital number, since it uses as much as digits as its factorization.

1267421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17922.

The product of its digits is 672, while the sum is 23.

The square root of 1267421 is about 1125.7979392413. The cubic root of 1267421 is about 108.2198596187.

The spelling of 1267421 in words is "one million, two hundred sixty-seven thousand, four hundred twenty-one".