1340978 has 4 divisors (see below), whose sum is σ = 2011470. Its totient is φ = 670488.

The previous prime is 1340959. The next prime is 1340981. The reversal of 1340978 is 8790431.

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

It can be written as a sum of positive squares in only one way, i.e., 1117249 + 223729 = 1057^2 + 473^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335243 + ... + 335246.

2^1340978 is an apocalyptic number.

1340978 is a deficient number, since it is larger than the sum of its proper divisors (670492).

1340978 is an equidigital number, since it uses as much as digits as its factorization.

1340978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670491.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1340978 is about 1158.0060448892. The cubic root of 1340978 is about 110.2741919992.

The spelling of 1340978 in words is "one million, three hundred forty thousand, nine hundred seventy-eight".