1974978 has 12 divisors (see below), whose sum is σ = 4279158. Its totient is φ = 658320.

The previous prime is 1974967. The next prime is 1974983. The reversal of 1974978 is 8794791.

It can be written as a sum of positive squares in only one way, i.e., 1361889 + 613089 = 1167^2 + 783^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54843 + ... + 54878.

2^1974978 is an apocalyptic number.

1974978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1974978 is an abundant number, since it is smaller than the sum of its proper divisors (2304180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1974978 is a wasteful number, since it uses less digits than its factorization.

1974978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109729 (or 109726 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1974978 is about 1405.3391049850. The cubic root of 1974978 is about 125.4644693416.

The spelling of 1974978 in words is "one million, nine hundred seventy-four thousand, nine hundred seventy-eight".