1147257 has 8 divisors (see below), whose sum is σ = 1699680. Its totient is φ = 764820.

The previous prime is 1147253. The next prime is 1147271. The reversal of 1147257 is 7527411.

It is not a de Polignac number, because 1147257 - 2² = 1147253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 42491 = 1147257 / (1 + 1 + 4 + 7 + 2 + 5 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 1147257.

It is not an unprimeable number, because it can be changed into a prime (1147253) 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, 21219 + ... + 21272.

It is an arithmetic number, because the mean of its divisors is an integer number (212460).

2^1147257 is an apocalyptic number.

It is an amenable number.

1147257 is a deficient number, since it is larger than the sum of its proper divisors (552423).

1147257 is an equidigital number, since it uses as much as digits as its factorization.

1147257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42500 (or 42494 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 1147257 is about 1071.1008355893. The cubic root of 1147257 is about 104.6855900892.

The spelling of 1147257 in words is "one million, one hundred forty-seven thousand, two hundred fifty-seven".