1255138 has 8 divisors (see below), whose sum is σ = 1909440. Its totient is φ = 618660.

The previous prime is 1255129. The next prime is 1255139. The reversal of 1255138 is 8315521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1255139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4278 + ... + 4561.

It is an arithmetic number, because the mean of its divisors is an integer number (238680).

2^1255138 is an apocalyptic number.

1255138 is a deficient number, since it is larger than the sum of its proper divisors (654302).

1255138 is an equidigital number, since it uses as much as digits as its factorization.

1255138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8912.

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

The square root of 1255138 is about 1120.3294158416. The cubic root of 1255138 is about 107.8691258790.

It can be divided in two parts, 125513 and 8, that added together give a palindrome (125521).

The spelling of 1255138 in words is "one million, two hundred fifty-five thousand, one hundred thirty-eight".