102645861 has 8 divisors (see below), whose sum is σ = 137302464. Its totient is φ = 68209920.

The previous prime is 102645853. The next prime is 102645871. The reversal of 102645861 is 168546201.

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

It is not a de Polignac number, because 102645861 - 2³ = 102645853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102645821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54076 + ... + 55941.

It is an arithmetic number, because the mean of its divisors is an integer number (17162808).

Almost surely, 2^102645861 is an apocalyptic number.

It is an amenable number.

102645861 is a deficient number, since it is larger than the sum of its proper divisors (34656603).

102645861 is a wasteful number, since it uses less digits than its factorization.

102645861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110331.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 102645861 is about 10131.4293660865. The cubic root of 102645861 is about 468.2169669336.

The spelling of 102645861 in words is "one hundred two million, six hundred forty-five thousand, eight hundred sixty-one".