1990515 has 8 divisors (see below), whose sum is σ = 3184848. Its totient is φ = 1061600.

The previous prime is 1990507. The next prime is 1990523. The reversal of 1990515 is 5150991.

It is an interprime number because it is at equal distance from previous prime (1990507) and next prime (1990523).

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

It is not a de Polignac number, because 1990515 - 2³ = 1990507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66336 + ... + 66365.

It is an arithmetic number, because the mean of its divisors is an integer number (398106).

2^1990515 is an apocalyptic number.

1990515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1990515 is a deficient number, since it is larger than the sum of its proper divisors (1194333).

1990515 is a wasteful number, since it uses less digits than its factorization.

1990515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132709.

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 1990515 is about 1410.8561230685. The cubic root of 1990515 is about 125.7926167794.

The spelling of 1990515 in words is "one million, nine hundred ninety thousand, five hundred fifteen".