125271555 has 16 divisors (see below), whose sum is σ = 212225184. Its totient is φ = 62881280.

The previous prime is 125271533. The next prime is 125271569. The reversal of 125271555 is 555172521.

It is not a de Polignac number, because 125271555 - 2¹⁹ = 124747267 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 245376 + ... + 245885.

It is an arithmetic number, because the mean of its divisors is an integer number (13264074).

Almost surely, 2^125271555 is an apocalyptic number.

125271555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125271555 is a deficient number, since it is larger than the sum of its proper divisors (86953629).

125271555 is a wasteful number, since it uses less digits than its factorization.

125271555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491286.

The product of its digits is 17500, while the sum is 33.

The square root of 125271555 is about 11192.4776077507. The cubic root of 125271555 is about 500.3618114551.

The spelling of 125271555 in words is "one hundred twenty-five million, two hundred seventy-one thousand, five hundred fifty-five".