1023531 has 8 divisors (see below), whose sum is σ = 1401744. Its totient is φ = 663840.

The previous prime is 1023521. The next prime is 1023541. The reversal of 1023531 is 1353201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1023521) and next prime (1023541).

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

It is not a de Polignac number, because 1023531 - 2⁵ = 1023499 is a prime.

It is a super-2 number, since 2×1023531² = 2095231415922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1023531.

It is not an unprimeable number, because it can be changed into a prime (1023521) 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, 4500 + ... + 4721.

It is an arithmetic number, because the mean of its divisors is an integer number (175218).

2^1023531 is an apocalyptic number.

1023531 is a deficient number, since it is larger than the sum of its proper divisors (378213).

1023531 is an equidigital number, since it uses as much as digits as its factorization.

1023531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9261.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1023531 is about 1011.6970890538. The cubic root of 1023531 is about 100.7782935435.

Adding to 1023531 its reverse (1353201), we get a palindrome (2376732).

The spelling of 1023531 in words is "one million, twenty-three thousand, five hundred thirty-one".