1255838 has 4 divisors (see below), whose sum is σ = 1883760. Its totient is φ = 627918.

The previous prime is 1255831. The next prime is 1255847. The reversal of 1255838 is 8385521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313958 + ... + 313961.

It is an arithmetic number, because the mean of its divisors is an integer number (470940).

2^1255838 is an apocalyptic number.

1255838 is a deficient number, since it is larger than the sum of its proper divisors (627922).

1255838 is an equidigital number, since it uses as much as digits as its factorization.

1255838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627921.

The product of its digits is 9600, while the sum is 32.

The square root of 1255838 is about 1120.6417804098. The cubic root of 1255838 is about 107.8891752960.

The spelling of 1255838 in words is "one million, two hundred fifty-five thousand, eight hundred thirty-eight".