1247897 has 8 divisors (see below), whose sum is σ = 1456896. Its totient is φ = 1046592.

The previous prime is 1247893. The next prime is 1247923. The reversal of 1247897 is 7987421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1247897 - 2² = 1247893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1247897.

It is not an unprimeable number, because it can be changed into a prime (1247893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1568 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (182112).

2^1247897 is an apocalyptic number.

It is an amenable number.

1247897 is a deficient number, since it is larger than the sum of its proper divisors (208999).

1247897 is an equidigital number, since it uses as much as digits as its factorization.

1247897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847.

The product of its digits is 28224, while the sum is 38.

The square root of 1247897 is about 1117.0931026553. The cubic root of 1247897 is about 107.6612902431.

The spelling of 1247897 in words is "one million, two hundred forty-seven thousand, eight hundred ninety-seven".