102521138 has 8 divisors (see below), whose sum is σ = 153829632. Its totient is φ = 51244596.

The previous prime is 102521113. The next prime is 102521141. The reversal of 102521138 is 831125201.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3131 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (19228704).

Almost surely, 2^102521138 is an apocalyptic number.

102521138 is a deficient number, since it is larger than the sum of its proper divisors (51308494).

102521138 is a wasteful number, since it uses less digits than its factorization.

102521138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15976.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 102521138 is about 10125.2722432535. The cubic root of 102521138 is about 468.0272496126.

Adding to 102521138 its reverse (831125201), we get a palindrome (933646339).

The spelling of 102521138 in words is "one hundred two million, five hundred twenty-one thousand, one hundred thirty-eight".