1255445145 has 12 divisors (see below), whose sum is σ = 2176104996. Its totient is φ = 669570720.

The previous prime is 1255445143. The next prime is 1255445171. The reversal of 1255445145 is 5415445521.

1255445145 is a `hidden beast` number, since 1 + 25 + 544 + 51 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 265461849 + 989983296 = 16293^2 + 31464^2 .

It is not a de Polignac number, because 1255445145 - 2¹ = 1255445143 is a prime.

It is a super-2 number, since 2×1255445145² = 3152285024208142050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255445143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13949346 + ... + 13949435.

It is an arithmetic number, because the mean of its divisors is an integer number (181342083).

Almost surely, 2^1255445145 is an apocalyptic number.

1255445145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255445145 is a deficient number, since it is larger than the sum of its proper divisors (920659851).

1255445145 is a wasteful number, since it uses less digits than its factorization.

1255445145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27898792 (or 27898789 counting only the distinct ones).

The product of its digits is 80000, while the sum is 36.

The square root of 1255445145 is about 35432.2613588238. The cubic root of 1255445145 is about 1078.7792405113.

The spelling of 1255445145 in words is "one billion, two hundred fifty-five million, four hundred forty-five thousand, one hundred forty-five".