102489555 has 16 divisors (see below), whose sum is σ = 187409664. Its totient is φ = 46852320.

The previous prime is 102489551. The next prime is 102489581. The reversal of 102489555 is 555984201.

It is not a de Polignac number, because 102489555 - 2² = 102489551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102489551) 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 15 ways as a sum of consecutive naturals, for example, 487941 + ... + 488150.

It is an arithmetic number, because the mean of its divisors is an integer number (11713104).

Almost surely, 2^102489555 is an apocalyptic number.

102489555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102489555 is a deficient number, since it is larger than the sum of its proper divisors (84920109).

102489555 is an equidigital number, since it uses as much as digits as its factorization.

102489555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976106.

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 102489555 is about 10123.7125107344. The cubic root of 102489555 is about 467.9791840037.

The spelling of 102489555 in words is "one hundred two million, four hundred eighty-nine thousand, five hundred fifty-five".