2104978 has 4 divisors (see below), whose sum is σ = 3157470. Its totient is φ = 1052488.

The previous prime is 2104969. The next prime is 2104987. The reversal of 2104978 is 8794012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2104969) and next prime (2104987).

It can be written as a sum of positive squares in only one way, i.e., 1896129 + 208849 = 1377^2 + 457^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526243 + ... + 526246.

2^2104978 is an apocalyptic number.

2104978 is a deficient number, since it is larger than the sum of its proper divisors (1052492).

2104978 is a wasteful number, since it uses less digits than its factorization.

2104978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052491.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2104978 is about 1450.8542311342. The cubic root of 2104978 is about 128.1590227315.

The spelling of 2104978 in words is "two million, one hundred four thousand, nine hundred seventy-eight".