1978701 has 8 divisors (see below), whose sum is σ = 2702784. Its totient is φ = 1286880.

The previous prime is 1978693. The next prime is 1978709. The reversal of 1978701 is 1078791.

It is an interprime number because it is at equal distance from previous prime (1978693) and next prime (1978709).

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

It is not a de Polignac number, because 1978701 - 2³ = 1978693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7921 + ... + 8166.

It is an arithmetic number, because the mean of its divisors is an integer number (337848).

2^1978701 is an apocalyptic number.

It is an amenable number.

1978701 is a deficient number, since it is larger than the sum of its proper divisors (724083).

1978701 is a wasteful number, since it uses less digits than its factorization.

1978701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16131.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 1978701 is about 1406.6630726652. The cubic root of 1978701 is about 125.5432568886.

The spelling of 1978701 in words is "one million, nine hundred seventy-eight thousand, seven hundred one".