1255555125 has 96 divisors (see below), whose sum is σ = 2505634560. Its totient is φ = 599760000.

The previous prime is 1255555123. The next prime is 1255555127. The reversal of 1255555125 is 5215555521.

It is an interprime number because it is at equal distance from previous prime (1255555123) and next prime (1255555127).

It is not a de Polignac number, because 1255555125 - 2¹ = 1255555123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255555125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255555123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 877911 + ... + 879339.

It is an arithmetic number, because the mean of its divisors is an integer number (26100360).

Almost surely, 2^1255555125 is an apocalyptic number.

1255555125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255555125 is a deficient number, since it is larger than the sum of its proper divisors (1250079435).

1255555125 is a wasteful number, since it uses less digits than its factorization.

1255555125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1519 counting only the distinct ones).

The product of its digits is 62500, while the sum is 36.

The square root of 1255555125 is about 35433.8133002927. The cubic root of 1255555125 is about 1078.8107408061.

The spelling of 1255555125 in words is "one billion, two hundred fifty-five million, five hundred fifty-five thousand, one hundred twenty-five".