1228257 has 8 divisors (see below), whose sum is σ = 1819680. Its totient is φ = 818820.

The previous prime is 1228247. The next prime is 1228273. The reversal of 1228257 is 7528221.

It is not a de Polignac number, because 1228257 - 2⁶ = 1228193 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: 45491 = 1228257 / (1 + 2 + 2 + 8 + 2 + 5 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 1228257.

It is not an unprimeable number, because it can be changed into a prime (1228247) 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, 22719 + ... + 22772.

It is an arithmetic number, because the mean of its divisors is an integer number (227460).

2^1228257 is an apocalyptic number.

It is an amenable number.

1228257 is a deficient number, since it is larger than the sum of its proper divisors (591423).

1228257 is an equidigital number, since it uses as much as digits as its factorization.

1228257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45500 (or 45494 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1228257 is about 1108.2675669711. The cubic root of 1228257 is about 107.0934926881.

It can be divided in two parts, 1228 and 257, that added together give a triangular number (1485 = T₅₄).

The spelling of 1228257 in words is "one million, two hundred twenty-eight thousand, two hundred fifty-seven".