1257797 has 4 divisors (see below), whose sum is σ = 1267116. Its totient is φ = 1248480.

The previous prime is 1257787. The next prime is 1257827. The reversal of 1257797 is 7977521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 776161 + 481636 = 881^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257797 - 2¹² = 1253701 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 1257797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257787) 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, 4454 + ... + 4727.

It is an arithmetic number, because the mean of its divisors is an integer number (316779).

2^1257797 is an apocalyptic number.

It is an amenable number.

1257797 is a deficient number, since it is larger than the sum of its proper divisors (9319).

1257797 is an equidigital number, since it uses as much as digits as its factorization.

1257797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9318.

The product of its digits is 30870, while the sum is 38.

The square root of 1257797 is about 1121.5154925368. The cubic root of 1257797 is about 107.9452454502.

The spelling of 1257797 in words is "one million, two hundred fifty-seven thousand, seven hundred ninety-seven".