1987306 has 8 divisors (see below), whose sum is σ = 3000420. Its totient is φ = 987168.

The previous prime is 1987303. The next prime is 1987309. The reversal of 1987306 is 6037891.

It is an interprime number because it is at equal distance from previous prime (1987303) and next prime (1987309).

It can be written as a sum of positive squares in 2 ways, for example, as 1985281 + 2025 = 1409^2 + 45^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2851 + ... + 3478.

2^1987306 is an apocalyptic number.

1987306 is a deficient number, since it is larger than the sum of its proper divisors (1013114).

1987306 is a wasteful number, since it uses less digits than its factorization.

1987306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6488.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1987306 is about 1409.7184115986. The cubic root of 1987306 is about 125.7249817493.

The spelling of 1987306 in words is "one million, nine hundred eighty-seven thousand, three hundred six".