1255424 has 24 divisors (see below), whose sum is σ = 2514330. Its totient is φ = 626688.

The previous prime is 1255421. The next prime is 1255427. The reversal of 1255424 is 4245521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1255421) and next prime (1255427).

It can be written as a sum of positive squares in only one way, i.e., 1254400 + 1024 = 1120^2 + 32^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1255424.

It is not an unprimeable number, because it can be changed into a prime (1255421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1742 + ... + 2354.

2^1255424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257165).

1255424 is an abundant number, since it is smaller than the sum of its proper divisors (1258906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255424 is an frugal number, since it uses more digits than its factorization.

1255424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 615 counting only the distinct ones).

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

The square root of 1255424 is about 1120.4570496007. The cubic root of 1255424 is about 107.8773183984.

The spelling of 1255424 in words is "one million, two hundred fifty-five thousand, four hundred twenty-four".