1980495 has 24 divisors (see below), whose sum is σ = 3745872. Its totient is φ = 960000.

The previous prime is 1980491. The next prime is 1980521. The reversal of 1980495 is 5940891.

It is not a de Polignac number, because 1980495 - 2² = 1980491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1506 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (156078).

2^1980495 is an apocalyptic number.

1980495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1980495 is a deficient number, since it is larger than the sum of its proper divisors (1765377).

1980495 is a wasteful number, since it uses less digits than its factorization.

1980495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023 (or 4020 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1980495 is about 1407.3006075462. The cubic root of 1980495 is about 125.5811869195.

It can be divided in two parts, 1980 and 495, that multiplied together give a square (980100 = 990²).

The spelling of 1980495 in words is "one million, nine hundred eighty thousand, four hundred ninety-five".