1255100005 has 8 divisors (see below), whose sum is σ = 1585389600. Its totient is φ = 951233616.

The previous prime is 1255100003. The next prime is 1255100029. The reversal of 1255100005 is 5000015521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1255100005 - 2¹ = 1255100003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255100003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6605695 + ... + 6605884.

It is an arithmetic number, because the mean of its divisors is an integer number (198173700).

Almost surely, 2^1255100005 is an apocalyptic number.

It is an amenable number.

1255100005 is a deficient number, since it is larger than the sum of its proper divisors (330289595).

1255100005 is a wasteful number, since it uses less digits than its factorization.

1255100005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13211603.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 1255100005 is about 35427.3906038816. The cubic root of 1255100005 is about 1078.6803741203.

Adding to 1255100005 its reverse (5000015521), we get a palindrome (6255115526).

The spelling of 1255100005 in words is "one billion, two hundred fifty-five million, one hundred thousand, five".