102145656 has 128 divisors (see below), whose sum is σ = 285768000. Its totient is φ = 30277632.

The previous prime is 102145633. The next prime is 102145661. The reversal of 102145656 is 656541201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1053000 + ... + 1053096.

Almost surely, 2^102145656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102145656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142884000).

102145656 is an abundant number, since it is smaller than the sum of its proper divisors (183622344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102145656 is a wasteful number, since it uses less digits than its factorization.

102145656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 102145656 is about 10106.7134123809. The cubic root of 102145656 is about 467.4551699031.

Adding to 102145656 its reverse (656541201), we get a palindrome (758686857).

The spelling of 102145656 in words is "one hundred two million, one hundred forty-five thousand, six hundred fifty-six".