1138257 has 6 divisors (see below), whose sum is σ = 1644162. Its totient is φ = 758832.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138257 is 7528311.

It can be written as a sum of positive squares in only one way, i.e., 767376 + 370881 = 876^2 + 609^2 .

It is not a de Polignac number, because 1138257 - 2¹⁰ = 1137233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1138257.

It is not an unprimeable number, because it can be changed into a prime (1138237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63228 + ... + 63245.

It is an arithmetic number, because the mean of its divisors is an integer number (274027).

2^1138257 is an apocalyptic number.

It is an amenable number.

1138257 is a deficient number, since it is larger than the sum of its proper divisors (505905).

1138257 is a wasteful number, since it uses less digits than its factorization.

1138257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126479 (or 126476 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1138257 is about 1066.8912784347. The cubic root of 1138257 is about 104.4111253393.

The spelling of 1138257 in words is "one million, one hundred thirty-eight thousand, two hundred fifty-seven".