1012521443 has 4 divisors (see below), whose sum is σ = 1012897368. Its totient is φ = 1012145520.

The previous prime is 1012521437. The next prime is 1012521451. The reversal of 1012521443 is 3441252101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3441252101 = 7 ⋅491607443.

It is a cyclic number.

It is not a de Polignac number, because 1012521443 - 2⁸ = 1012521187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012521143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183893 + ... + 189318.

It is an arithmetic number, because the mean of its divisors is an integer number (253224342).

Almost surely, 2^1012521443 is an apocalyptic number.

1012521443 is a deficient number, since it is larger than the sum of its proper divisors (375925).

1012521443 is an equidigital number, since it uses as much as digits as its factorization.

1012521443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375924.

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

The square root of 1012521443 is about 31820.1420958487. The cubic root of 1012521443 is about 1004.1565137896.

Adding to 1012521443 its reverse (3441252101), we get a palindrome (4453773544).

The spelling of 1012521443 in words is "one billion, twelve million, five hundred twenty-one thousand, four hundred forty-three".