102305645 has 8 divisors (see below), whose sum is σ = 132210456. Its totient is φ = 75548736.

The previous prime is 102305639. The next prime is 102305653. The reversal of 102305645 is 546503201.

It can be written as a sum of positive squares in 4 ways, for example, as 315844 + 101989801 = 562^2 + 10099^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 102305645 - 2⁸ = 102305389 is a prime.

It is a super-3 number, since 3×102305645³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786902 + ... + 787031.

It is an arithmetic number, because the mean of its divisors is an integer number (16526307).

Almost surely, 2^102305645 is an apocalyptic number.

It is an amenable number.

102305645 is a deficient number, since it is larger than the sum of its proper divisors (29904811).

102305645 is a wasteful number, since it uses less digits than its factorization.

102305645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573951.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 102305645 is about 10114.6253020070. The cubic root of 102305645 is about 467.6990982822.

Adding to 102305645 its reverse (546503201), we get a palindrome (648808846).

The spelling of 102305645 in words is "one hundred two million, three hundred five thousand, six hundred forty-five".