1978274 has 8 divisors (see below), whose sum is σ = 2983068. Its totient is φ = 983920.

The previous prime is 1978267. The next prime is 1978289. The reversal of 1978274 is 4728791.

It can be written as a sum of positive squares in 2 ways, for example, as 1423249 + 555025 = 1193^2 + 745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2117 + ... + 2904.

2^1978274 is an apocalyptic number.

1978274 is a deficient number, since it is larger than the sum of its proper divisors (1004794).

1978274 is a wasteful number, since it uses less digits than its factorization.

1978274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220.

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

The square root of 1978274 is about 1406.5112868370. The cubic root of 1978274 is about 125.5342255717.

The spelling of 1978274 in words is "one million, nine hundred seventy-eight thousand, two hundred seventy-four".