102478 has 4 divisors (see below), whose sum is σ = 153720. Its totient is φ = 51238.

The previous prime is 102461. The next prime is 102481. The reversal of 102478 is 874201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874201 = 571 ⋅1531.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25618 + ... + 25621.

It is an arithmetic number, because the mean of its divisors is an integer number (38430).

2¹⁰²⁴⁷⁸ is an apocalyptic number.

102478 is a deficient number, since it is larger than the sum of its proper divisors (51242).

102478 is an equidigital number, since it uses as much as digits as its factorization.

102478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51241.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 102478 is about 320.1218518002. The cubic root of 102478 is about 46.7961596186.

Adding to 102478 its reverse (874201), we get a palindrome (976679).

The spelling of 102478 in words is "one hundred two thousand, four hundred seventy-eight".