1987315 has 16 divisors (see below), whose sum is σ = 2716416. Its totient is φ = 1381600.

The previous prime is 1987313. The next prime is 1987333. The reversal of 1987315 is 5137891.

1987315 = T₄₁₄ + T₄₁₅ + ... + T₄₃₅.

It is a happy number.

It is not a de Polignac number, because 1987315 - 2¹ = 1987313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 2050.

It is an arithmetic number, because the mean of its divisors is an integer number (169776).

2^1987315 is an apocalyptic number.

1987315 is a deficient number, since it is larger than the sum of its proper divisors (729101).

1987315 is a wasteful number, since it uses less digits than its factorization.

1987315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610.

The product of its digits is 7560, while the sum is 34.

The square root of 1987315 is about 1409.7216037218. The cubic root of 1987315 is about 125.7251715411.

The spelling of 1987315 in words is "one million, nine hundred eighty-seven thousand, three hundred fifteen".