650401 has 2 divisors, whose sum is σ = 650402. Its totient is φ = 650400.

The previous prime is 650387. The next prime is 650413. The reversal of 650401 is 104056.

650401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358801 + 291600 = 599^2 + 540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650401 is a prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (650701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325200 + 325201.

It is an arithmetic number, because the mean of its divisors is an integer number (325201).

2⁶⁵⁰⁴⁰¹ is an apocalyptic number.

It is an amenable number.

650401 is a deficient number, since it is larger than the sum of its proper divisors (1).

650401 is an equidigital number, since it uses as much as digits as its factorization.

650401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 650401 is about 806.4744261289. The cubic root of 650401 is about 86.6417203020.

Adding to 650401 its reverse (104056), we get a palindrome (754457).

The spelling of 650401 in words is "six hundred fifty thousand, four hundred one".