1427978 has 16 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 663696.

The previous prime is 1427969. The next prime is 1427999. The reversal of 1427978 is 8797241.

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, 1283 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2^1427978 is an apocalyptic number.

1427978 is a deficient number, since it is larger than the sum of its proper divisors (870262).

1427978 is a wasteful number, since it uses less digits than its factorization.

1427978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901.

The product of its digits is 28224, while the sum is 38.

The square root of 1427978 is about 1194.9803345662. The cubic root of 1427978 is about 112.6091911055.

The spelling of 1427978 in words is "one million, four hundred twenty-seven thousand, nine hundred seventy-eight".