1978246 has 4 divisors (see below), whose sum is σ = 2967372. Its totient is φ = 989122.

The previous prime is 1978219. The next prime is 1978267. The reversal of 1978246 is 6428791.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494560 + ... + 494563.

It is an arithmetic number, because the mean of its divisors is an integer number (741843).

2^1978246 is an apocalyptic number.

1978246 is a deficient number, since it is larger than the sum of its proper divisors (989126).

1978246 is an equidigital number, since it uses as much as digits as its factorization.

1978246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989125.

The product of its digits is 24192, while the sum is 37.

The square root of 1978246 is about 1406.5013330957. The cubic root of 1978246 is about 125.5336333088.

The spelling of 1978246 in words is "one million, nine hundred seventy-eight thousand, two hundred forty-six".