816487 has 12 divisors (see below), whose sum is σ = 1000920. Its totient is φ = 662256.

The previous prime is 816469. The next prime is 816499. The reversal of 816487 is 784618.

It is a happy number.

It is not a de Polignac number, because 816487 - 2¹⁵ = 783719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493 + ... + 1369.

It is an arithmetic number, because the mean of its divisors is an integer number (83410).

2⁸¹⁶⁴⁸⁷ is an apocalyptic number.

816487 is a deficient number, since it is larger than the sum of its proper divisors (184433).

816487 is a wasteful number, since it uses less digits than its factorization.

816487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 903 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 816487 is about 903.5967020745. The cubic root of 816487 is about 93.4651609362.

It can be divided in two parts, 81648 and 7, that multiplied together give a square (571536 = 756²).

The spelling of 816487 in words is "eight hundred sixteen thousand, four hundred eighty-seven".