1255521235 has 32 divisors (see below), whose sum is σ = 1644318720. Its totient is φ = 916790400.

The previous prime is 1255521227. The next prime is 1255521251. The reversal of 1255521235 is 5321255521.

It is not a de Polignac number, because 1255521235 - 2³ = 1255521227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 1255521197 and 1255521206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773725 + ... + 775345.

It is an arithmetic number, because the mean of its divisors is an integer number (51384960).

Almost surely, 2^1255521235 is an apocalyptic number.

1255521235 is a deficient number, since it is larger than the sum of its proper divisors (388797485).

1255521235 is a wasteful number, since it uses less digits than its factorization.

1255521235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its digits is 15000, while the sum is 31.

The square root of 1255521235 is about 35433.3350815302. The cubic root of 1255521235 is about 1078.8010342829.

Adding to 1255521235 its reverse (5321255521), we get a palindrome (6576776756).

The spelling of 1255521235 in words is "one billion, two hundred fifty-five million, five hundred twenty-one thousand, two hundred thirty-five".