102125155 has 8 divisors (see below), whose sum is σ = 133691184. Its totient is φ = 74272800.

The previous prime is 102125147. The next prime is 102125159. The reversal of 102125155 is 551521201.

It is a happy number.

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

It is not a de Polignac number, because 102125155 - 2³ = 102125147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102125159) 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 7 ways as a sum of consecutive naturals, for example, 928356 + ... + 928465.

It is an arithmetic number, because the mean of its divisors is an integer number (16711398).

Almost surely, 2^102125155 is an apocalyptic number.

102125155 is a deficient number, since it is larger than the sum of its proper divisors (31566029).

102125155 is a wasteful number, since it uses less digits than its factorization.

102125155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856837.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 102125155 is about 10105.6991346467. The cubic root of 102125155 is about 467.4238945002.

Adding to 102125155 its reverse (551521201), we get a palindrome (653646356).

The spelling of 102125155 in words is "one hundred two million, one hundred twenty-five thousand, one hundred fifty-five".