662401 has 2 divisors, whose sum is σ = 662402. Its totient is φ = 662400.

The previous prime is 662369. The next prime is 662407. The reversal of 662401 is 104266.

662401 = 575² + 576².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331776 + 330625 = 576^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 662401 - 2⁵ = 662369 is a prime.

It is not a weakly prime, because it can be changed into another prime (662407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331200 + 331201.

It is an arithmetic number, because the mean of its divisors is an integer number (331201).

2⁶⁶²⁴⁰¹ is an apocalyptic number.

662401 is the 576-th centered square number.

It is an amenable number.

662401 is a deficient number, since it is larger than the sum of its proper divisors (1).

662401 is an equidigital number, since it uses as much as digits as its factorization.

662401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 662401 is about 813.8802123163. The cubic root of 662401 is about 87.1713275117.

Adding to 662401 its reverse (104266), we get a palindrome (766667).

The spelling of 662401 in words is "six hundred sixty-two thousand, four hundred one".