1023521441 has 4 divisors (see below), whose sum is σ = 1028880384. Its totient is φ = 1018162500.

The previous prime is 1023521437. The next prime is 1023521461. The reversal of 1023521441 is 1441253201.

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 a cyclic number.

It is not a de Polignac number, because 1023521441 - 2² = 1023521437 is a prime.

It is a super-2 number, since 2×1023521441² = 2095192280373432962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1023521461) 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, 2679185 + ... + 2679566.

It is an arithmetic number, because the mean of its divisors is an integer number (257220096).

Almost surely, 2^1023521441 is an apocalyptic number.

It is an amenable number.

1023521441 is a deficient number, since it is larger than the sum of its proper divisors (5358943).

1023521441 is an equidigital number, since it uses as much as digits as its factorization.

1023521441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358942.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1023521441 is about 31992.5216417837. The cubic root of 1023521441 is about 1007.7797981165.

Adding to 1023521441 its reverse (1441253201), we get a palindrome (2464774642).

The spelling of 1023521441 in words is "one billion, twenty-three million, five hundred twenty-one thousand, four hundred forty-one".