781064 has 16 divisors (see below), whose sum is σ = 1482300. Its totient is φ = 385792.

The previous prime is 781063. The next prime is 781069. The reversal of 781064 is 460187.

781064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 722500 + 58564 = 850^2 + 242^2 .

It is a super-2 number, since 2×781064² = 1220121944192, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 781064.

It is not an unprimeable number, because it can be changed into a prime (781063) 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, 164 + ... + 1260.

2⁷⁸¹⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

781064 is a deficient number, since it is larger than the sum of its proper divisors (701236).

781064 is a wasteful number, since it uses less digits than its factorization.

781064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 781064 is about 883.7782527309. The cubic root of 781064 is about 92.0934777674.

The spelling of 781064 in words is "seven hundred eighty-one thousand, sixty-four".