432721 has 2 divisors, whose sum is σ = 432722. Its totient is φ = 432720.

The previous prime is 432713. The next prime is 432727. The reversal of 432721 is 127234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239121 + 193600 = 489^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 432721 - 2³ = 432713 is a prime.

It is a Chen prime.

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

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (432727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216360 + 216361.

It is an arithmetic number, because the mean of its divisors is an integer number (216361).

2⁴³²⁷²¹ is an apocalyptic number.

It is an amenable number.

432721 is a deficient number, since it is larger than the sum of its proper divisors (1).

432721 is an equidigital number, since it uses as much as digits as its factorization.

432721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 19.

The square root of 432721 is about 657.8153236281. The cubic root of 432721 is about 75.6372953166.

Adding to 432721 its reverse (127234), we get a palindrome (559955).

The spelling of 432721 in words is "four hundred thirty-two thousand, seven hundred twenty-one".