787491 has 12 divisors (see below), whose sum is σ = 1204632. Its totient is φ = 494016.

The previous prime is 787489. The next prime is 787513. The reversal of 787491 is 194787.

It is not a de Polignac number, because 787491 - 2¹ = 787489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (787091) 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, 2421 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (100386).

2⁷⁸⁷⁴⁹¹ is an apocalyptic number.

787491 is a deficient number, since it is larger than the sum of its proper divisors (417141).

787491 is a wasteful number, since it uses less digits than its factorization.

787491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170 (or 5167 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 787491 is about 887.4068965249. The cubic root of 787491 is about 92.3453857278.

Subtracting from 787491 its reverse (194787), we obtain a cube (592704 = 84³).

It can be divided in two parts, 78 and 7491, that added together give a square (7569 = 87²).

The spelling of 787491 in words is "seven hundred eighty-seven thousand, four hundred ninety-one".