1023261 has 4 divisors (see below), whose sum is σ = 1364352. Its totient is φ = 682172.

The previous prime is 1023259. The next prime is 1023263. The reversal of 1023261 is 1623201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1023259) and next prime (1023263).

It is a cyclic number.

It is not a de Polignac number, because 1023261 - 2¹ = 1023259 is a prime.

It is a D-number.

1023261 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023263) 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 3 ways as a sum of consecutive naturals, for example, 170541 + ... + 170546.

It is an arithmetic number, because the mean of its divisors is an integer number (341088).

2^1023261 is an apocalyptic number.

It is an amenable number.

1023261 is a deficient number, since it is larger than the sum of its proper divisors (341091).

1023261 is an equidigital number, since it uses as much as digits as its factorization.

1023261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341090.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1023261 is about 1011.5636411022. The cubic root of 1023261 is about 100.7694312383.

Adding to 1023261 its reverse (1623201), we get a palindrome (2646462).

The spelling of 1023261 in words is "one million, twenty-three thousand, two hundred sixty-one".