1255442 has 4 divisors (see below), whose sum is σ = 1883166. Its totient is φ = 627720.

The previous prime is 1255427. The next prime is 1255451. The reversal of 1255442 is 2445521.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 844561 + 410881 = 919^2 + 641^2 .

It is a super-2 number, since 2×1255442² = 3152269230728, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313859 + ... + 313862.

2^1255442 is an apocalyptic number.

1255442 is a deficient number, since it is larger than the sum of its proper divisors (627724).

1255442 is an equidigital number, since it uses as much as digits as its factorization.

1255442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627723.

The product of its digits is 1600, while the sum is 23.

The square root of 1255442 is about 1120.4650820084. The cubic root of 1255442 is about 107.8778339698.

The spelling of 1255442 in words is "one million, two hundred fifty-five thousand, four hundred forty-two".