102781357 has 8 divisors (see below), whose sum is σ = 117900032. Its totient is φ = 87771600.

The previous prime is 102781351. The next prime is 102781361. The reversal of 102781357 is 753187201.

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

It is not a de Polignac number, because 102781357 - 2⁷ = 102781229 is a prime.

It is a super-3 number, since 3×102781357³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102781351) 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, 25194 + ... + 28987.

It is an arithmetic number, because the mean of its divisors is an integer number (14737504).

Almost surely, 2^102781357 is an apocalyptic number.

It is an amenable number.

102781357 is a deficient number, since it is larger than the sum of its proper divisors (15118675).

102781357 is an equidigital number, since it uses as much as digits as its factorization.

102781357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54459.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 102781357 is about 10138.1140751128. The cubic root of 102781357 is about 468.4228970802.

The spelling of 102781357 in words is "one hundred two million, seven hundred eighty-one thousand, three hundred fifty-seven".