1255523340 has 24 divisors (see below), whose sum is σ = 3515465520. Its totient is φ = 334806208.

The previous prime is 1255523329. The next prime is 1255523359. The reversal of 1255523340 is 433255521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1255523298 and 1255523307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10462635 + ... + 10462754.

It is an arithmetic number, because the mean of its divisors is an integer number (146477730).

Almost surely, 2^1255523340 is an apocalyptic number.

1255523340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255523340 is an abundant number, since it is smaller than the sum of its proper divisors (2259942180).

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

1255523340 is a wasteful number, since it uses less digits than its factorization.

1255523340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20925401 (or 20925399 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 1255523340 is about 35433.3647851852. The cubic root of 1255523340 is about 1078.8016371865.

Adding to 1255523340 its reverse (433255521), we get a palindrome (1688778861).

The spelling of 1255523340 in words is "one billion, two hundred fifty-five million, five hundred twenty-three thousand, three hundred forty".