1978102 has 16 divisors (see below), whose sum is σ = 3411360. Its totient is φ = 842688.

The previous prime is 1978091. The next prime is 1978111. The reversal of 1978102 is 2018791.

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, 2898 + ... + 3514.

It is an arithmetic number, because the mean of its divisors is an integer number (213210).

2^1978102 is an apocalyptic number.

1978102 is a deficient number, since it is larger than the sum of its proper divisors (1433258).

1978102 is a wasteful number, since it uses less digits than its factorization.

1978102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1978102 is about 1406.4501413132. The cubic root of 1978102 is about 125.5305872970.

It can be divided in two parts, 1978 and 102, that added together give a triangular number (2080 = T₆₄).

The spelling of 1978102 in words is "one million, nine hundred seventy-eight thousand, one hundred two".