1274991 has 4 divisors (see below), whose sum is σ = 1699992. Its totient is φ = 849992.

The previous prime is 1274989. The next prime is 1275011. The reversal of 1274991 is 1994721.

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 1274991 - 2¹ = 1274989 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1274921) 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, 212496 + ... + 212501.

It is an arithmetic number, because the mean of its divisors is an integer number (424998).

2^1274991 is an apocalyptic number.

1274991 is a deficient number, since it is larger than the sum of its proper divisors (425001).

1274991 is an equidigital number, since it uses as much as digits as its factorization.

1274991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425000.

The product of its digits is 4536, while the sum is 33.

The square root of 1274991 is about 1129.1549937896. The cubic root of 1274991 is about 108.4348891204.

The spelling of 1274991 in words is "one million, two hundred seventy-four thousand, nine hundred ninety-one".