1140257 has 2 divisors, whose sum is σ = 1140258. Its totient is φ = 1140256.

The previous prime is 1140253. The next prime is 1140281. The reversal of 1140257 is 7520411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781456 + 358801 = 884^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140257 - 2² = 1140253 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1140253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570128 + 570129.

It is an arithmetic number, because the mean of its divisors is an integer number (570129).

2^1140257 is an apocalyptic number.

It is an amenable number.

1140257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140257 is an equidigital number, since it uses as much as digits as its factorization.

1140257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1140257 is about 1067.8281696977. The cubic root of 1140257 is about 104.4722421944.

Adding to 1140257 its reverse (7520411), we get a palindrome (8660668).

The spelling of 1140257 in words is "one million, one hundred forty thousand, two hundred fifty-seven".