1016401 has 2 divisors, whose sum is σ = 1016402. Its totient is φ = 1016400.

The previous prime is 1016399. The next prime is 1016419. The reversal of 1016401 is 1046101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1002001 + 14400 = 1001^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1016401 - 2¹ = 1016399 is a prime.

Together with 1016399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1016441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508200 + 508201.

It is an arithmetic number, because the mean of its divisors is an integer number (508201).

2^1016401 is an apocalyptic number.

It is an amenable number.

1016401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016401 is an equidigital number, since it uses as much as digits as its factorization.

1016401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1016401 is about 1008.1671488399. The cubic root of 1016401 is about 100.5437381299.

The spelling of 1016401 in words is "one million, sixteen thousand, four hundred one".