1138255 has 4 divisors (see below), whose sum is σ = 1365912. Its totient is φ = 910600.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138255 is 5528311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5528311 = 1009 ⋅5479.

It is an interprime number because it is at equal distance from previous prime (1138237) and next prime (1138273).

It is not a de Polignac number, because 1138255 - 2⁷ = 1138127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113821 + ... + 113830.

It is an arithmetic number, because the mean of its divisors is an integer number (341478).

2^1138255 is an apocalyptic number.

1138255 is a deficient number, since it is larger than the sum of its proper divisors (227657).

1138255 is an equidigital number, since it uses as much as digits as its factorization.

1138255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227656.

The product of its digits is 1200, while the sum is 25.

The square root of 1138255 is about 1066.8903411316. The cubic root of 1138255 is about 104.4110641866.

The spelling of 1138255 in words is "one million, one hundred thirty-eight thousand, two hundred fifty-five".