546781 has 2 divisors, whose sum is σ = 546782. Its totient is φ = 546780.

The previous prime is 546739. The next prime is 546841. The reversal of 546781 is 187645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502681 + 44100 = 709^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 546781 - 2¹³ = 538589 is a prime.

It is a super-2 number, since 2×546781² = 597938923922, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 5.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (546731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273390 + 273391.

It is an arithmetic number, because the mean of its divisors is an integer number (273391).

2⁵⁴⁶⁷⁸¹ is an apocalyptic number.

It is an amenable number.

546781 is a deficient number, since it is larger than the sum of its proper divisors (1).

546781 is an equidigital number, since it uses as much as digits as its factorization.

546781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 546781 is about 739.4464145562. The cubic root of 546781 is about 81.7719720732.

It can be divided in two parts, 546 and 781, that multiplied together give a triangular number (426426 = T₉₂₃).

The spelling of 546781 in words is "five hundred forty-six thousand, seven hundred eighty-one".