1650401 has 2 divisors, whose sum is σ = 1650402. Its totient is φ = 1650400.

The previous prime is 1650379. The next prime is 1650413. The reversal of 1650401 is 1040561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 50176 = 1265^2 + 224^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650401 - 2¹⁰ = 1649377 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1650401.

It is not a weakly prime, because it can be changed into another prime (1650491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825200 + 825201.

It is an arithmetic number, because the mean of its divisors is an integer number (825201).

2^1650401 is an apocalyptic number.

It is an amenable number.

1650401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650401 is an equidigital number, since it uses as much as digits as its factorization.

1650401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1650401 is about 1284.6793374224. The cubic root of 1650401 is about 118.1761469576.

Adding to 1650401 its reverse (1040561), we get a palindrome (2690962).

The spelling of 1650401 in words is "one million, six hundred fifty thousand, four hundred one".