781494 has 32 divisors (see below), whose sum is σ = 1866240. Its totient is φ = 213312.

The previous prime is 781493. The next prime is 781511. The reversal of 781494 is 494187.

It is a super-2 number, since 2×781494² = 1221465744072, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781493) 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, 562 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (58320).

2⁷⁸¹⁴⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933120).

781494 is an abundant number, since it is smaller than the sum of its proper divisors (1084746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

781494 is a wasteful number, since it uses less digits than its factorization.

781494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its digits is 8064, while the sum is 33.

The square root of 781494 is about 884.0214929514. The cubic root of 781494 is about 92.1103747740.

It can be divided in two parts, 781 and 494, that added together give a triangular number (1275 = T₅₀).

The spelling of 781494 in words is "seven hundred eighty-one thousand, four hundred ninety-four".