1375978 has 8 divisors (see below), whose sum is σ = 2072772. Its totient is φ = 685056.

The previous prime is 1375951. The next prime is 1375981. The reversal of 1375978 is 8795731.

It can be written as a sum of positive squares in 2 ways, for example, as 1375929 + 49 = 1173^2 + 7^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1375978.

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, 825 + ... + 1852.

2^1375978 is an apocalyptic number.

1375978 is a deficient number, since it is larger than the sum of its proper divisors (696794).

1375978 is a wasteful number, since it uses less digits than its factorization.

1375978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936.

The product of its digits is 52920, while the sum is 40.

The square root of 1375978 is about 1173.0208864296. The cubic root of 1375978 is about 111.2253625533.

The spelling of 1375978 in words is "one million, three hundred seventy-five thousand, nine hundred seventy-eight".