1023641 has 8 divisors (see below), whose sum is σ = 1057224. Its totient is φ = 990720.

The previous prime is 1023601. The next prime is 1023643. The reversal of 1023641 is 1463201.

It can be written as a sum of positive squares in 4 ways, for example, as 92416 + 931225 = 304^2 + 965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1023641 - 2⁶ = 1023577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5831 + ... + 6003.

It is an arithmetic number, because the mean of its divisors is an integer number (132153).

2^1023641 is an apocalyptic number.

It is an amenable number.

1023641 is a deficient number, since it is larger than the sum of its proper divisors (33583).

1023641 is an equidigital number, since it uses as much as digits as its factorization.

With its predecessor (1023640) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (331).

1023641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1023641 is about 1011.7514516916. The cubic root of 1023641 is about 100.7819036654.

Adding to 1023641 its reverse (1463201), we get a palindrome (2486842).

The spelling of 1023641 in words is "one million, twenty-three thousand, six hundred forty-one".