78741 has 12 divisors (see below), whose sum is σ = 122668. Its totient is φ = 48384.

The previous prime is 78737. The next prime is 78779. The reversal of 78741 is 14787.

Added to its reverse (14787) it gives a triangular number (93528 = T₄₃₂).

It can be written as a sum of positive squares in 2 ways, for example, as 18225 + 60516 = 135^2 + 246^2 .

It is not a de Polignac number, because 78741 - 2² = 78737 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78721) 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, 220 + ... + 453.

2⁷⁸⁷⁴¹ is an apocalyptic number.

It is an amenable number.

78741 is a deficient number, since it is larger than the sum of its proper divisors (43927).

78741 is a wasteful number, since it uses less digits than its factorization.

78741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 689 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 78741 is about 280.6082678753. The cubic root of 78741 is about 42.8614614696.

Adding to 78741 its reverse (14787), we get a triangular number (93528 = T₄₃₂).

It can be divided in two parts, 7874 and 1, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 78741 in words is "seventy-eight thousand, seven hundred forty-one".