1255520235 has 16 divisors (see below), whose sum is σ = 2055550464. Its totient is φ = 654038112.

The previous prime is 1255520207. The next prime is 1255520257. The reversal of 1255520235 is 5320255521.

It is not a de Polignac number, because 1255520235 - 2⁹ = 1255519723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972627 + ... + 973916.

It is an arithmetic number, because the mean of its divisors is an integer number (128471904).

Almost surely, 2^1255520235 is an apocalyptic number.

1255520235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255520235 is a deficient number, since it is larger than the sum of its proper divisors (800030229).

1255520235 is a wasteful number, since it uses less digits than its factorization.

1255520235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946594.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1255520235 is about 35433.3209705215. The cubic root of 1255520235 is about 1078.8007478676.

Adding to 1255520235 its reverse (5320255521), we get a palindrome (6575775756).

The spelling of 1255520235 in words is "one billion, two hundred fifty-five million, five hundred twenty thousand, two hundred thirty-five".