1980915 has 16 divisors (see below), whose sum is σ = 3247776. Its totient is φ = 1030400.

The previous prime is 1980911. The next prime is 1980919. The reversal of 1980915 is 5190891.

It is an interprime number because it is at equal distance from previous prime (1980911) and next prime (1980919).

It is not a de Polignac number, because 1980915 - 2² = 1980911 is a prime.

1980915 is a lucky number.

It is a zygodrome in base 2 and base 11.

It is not an unprimeable number, because it can be changed into a prime (1980911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 996 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (202986).

2^1980915 is an apocalyptic number.

1980915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1980915 is a deficient number, since it is larger than the sum of its proper divisors (1266861).

1980915 is a wasteful number, since it uses less digits than its factorization.

1980915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 1980915 is about 1407.4498214857. The cubic root of 1980915 is about 125.5900635505.

The spelling of 1980915 in words is "one million, nine hundred eighty thousand, nine hundred fifteen".