432781 has 2 divisors, whose sum is σ = 432782. Its totient is φ = 432780.

The previous prime is 432749. The next prime is 432793. The reversal of 432781 is 187234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348100 + 84681 = 590^2 + 291^2 .

It is a cyclic number.

It is not a de Polignac number, because 432781 - 2⁵ = 432749 is a prime.

It is a super-2 number, since 2×432781² = 374598787922, which contains 22 as substring.

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

It is equal to p₃₆₃₈₅ and since 432781 and 36385 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216390 + 216391.

It is an arithmetic number, because the mean of its divisors is an integer number (216391).

2⁴³²⁷⁸¹ is an apocalyptic number.

It is an amenable number.

432781 is a deficient number, since it is larger than the sum of its proper divisors (1).

432781 is an equidigital number, since it uses as much as digits as its factorization.

432781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 432781 is about 657.8609275523. The cubic root of 432781 is about 75.6407910471.

The spelling of 432781 in words is "four hundred thirty-two thousand, seven hundred eighty-one".