1255520445 has 32 divisors (see below), whose sum is σ = 2102101632. Its totient is φ = 639205632.

The previous prime is 1255520443. The next prime is 1255520459. The reversal of 1255520445 is 5440255521.

It is not a de Polignac number, because 1255520445 - 2¹ = 1255520443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255520443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8074 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (65690676).

Almost surely, 2^1255520445 is an apocalyptic number.

1255520445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255520445 is a deficient number, since it is larger than the sum of its proper divisors (846581187).

1255520445 is a wasteful number, since it uses less digits than its factorization.

1255520445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42781.

The product of its (nonzero) digits is 40000, while the sum is 33.

The square root of 1255520445 is about 35433.3239338338. The cubic root of 1255520445 is about 1078.8008080148.

Adding to 1255520445 its reverse (5440255521), we get a palindrome (6695775966).

The spelling of 1255520445 in words is "one billion, two hundred fifty-five million, five hundred twenty thousand, four hundred forty-five".