102542861 has 8 divisors (see below), whose sum is σ = 110885760. Its totient is φ = 94456768.

The previous prime is 102542837. The next prime is 102542879. The reversal of 102542861 is 168245201.

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 102542861 - 2²² = 98348557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102542821) 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, 63371 + ... + 64968.

It is an arithmetic number, because the mean of its divisors is an integer number (13860720).

Almost surely, 2^102542861 is an apocalyptic number.

It is an amenable number.

102542861 is a deficient number, since it is larger than the sum of its proper divisors (8342899).

102542861 is a wasteful number, since it uses less digits than its factorization.

102542861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128403.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 102542861 is about 10126.3448983333. The cubic root of 102542861 is about 468.0603037324.

The spelling of 102542861 in words is "one hundred two million, five hundred forty-two thousand, eight hundred sixty-one".