1980725 has 6 divisors (see below), whose sum is σ = 2456130. Its totient is φ = 1584560.

The previous prime is 1980707. The next prime is 1980743. The reversal of 1980725 is 5270891.

It is an interprime number because it is at equal distance from previous prime (1980707) and next prime (1980743).

It can be written as a sum of positive squares in 3 ways, for example, as 398161 + 1582564 = 631^2 + 1258^2 .

It is not a de Polignac number, because 1980725 - 2⁶ = 1980661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1980691 and 1980700.

It is a congruent number.

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, 39590 + ... + 39639.

It is an arithmetic number, because the mean of its divisors is an integer number (409355).

2^1980725 is an apocalyptic number.

It is an amenable number.

1980725 is a deficient number, since it is larger than the sum of its proper divisors (475405).

1980725 is an equidigital number, since it uses as much as digits as its factorization.

1980725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79239 (or 79234 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1980725 is about 1407.3823219012. The cubic root of 1980725 is about 125.5860480872.

The spelling of 1980725 in words is "one million, nine hundred eighty thousand, seven hundred twenty-five".