1267921 has 4 divisors (see below), whose sum is σ = 1323072. Its totient is φ = 1212772.

The previous prime is 1267907. The next prime is 1267933. The reversal of 1267921 is 1297621.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1297621 = 13 ⋅99817.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1267921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1267921.

It is not an unprimeable number, because it can be changed into a prime (1267951) 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, 27541 + ... + 27586.

It is an arithmetic number, because the mean of its divisors is an integer number (330768).

2^1267921 is an apocalyptic number.

It is an amenable number.

1267921 is a deficient number, since it is larger than the sum of its proper divisors (55151).

1267921 is an equidigital number, since it uses as much as digits as its factorization.

1267921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55150.

The product of its digits is 1512, while the sum is 28.

The square root of 1267921 is about 1126.0199820607. The cubic root of 1267921 is about 108.2340887281.

The spelling of 1267921 in words is "one million, two hundred sixty-seven thousand, nine hundred twenty-one".