1026401 has 2 divisors, whose sum is σ = 1026402. Its totient is φ = 1026400.

The previous prime is 1026391. The next prime is 1026407. The reversal of 1026401 is 1046201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 564001 + 462400 = 751^2 + 680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1026401 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1026407) 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, 513200 + 513201.

It is an arithmetic number, because the mean of its divisors is an integer number (513201).

2^1026401 is an apocalyptic number.

It is an amenable number.

1026401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026401 is an equidigital number, since it uses as much as digits as its factorization.

1026401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1026401 is about 1013.1145048809. The cubic root of 1026401 is about 100.8724003769.

The spelling of 1026401 in words is "one million, twenty-six thousand, four hundred one".