1021331452 has 12 divisors (see below), whose sum is σ = 1789260480. Its totient is φ = 510114176.

The previous prime is 1021331449. The next prime is 1021331459. The reversal of 1021331452 is 2541331201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021331459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133708 + ... + 141139.

It is an arithmetic number, because the mean of its divisors is an integer number (149105040).

Almost surely, 2^1021331452 is an apocalyptic number.

It is an amenable number.

1021331452 is a deficient number, since it is larger than the sum of its proper divisors (767929028).

1021331452 is a wasteful number, since it uses less digits than its factorization.

1021331452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275780 (or 275778 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1021331452 is about 31958.2767370207. The cubic root of 1021331452 is about 1007.0605157924.

Adding to 1021331452 its reverse (2541331201), we get a palindrome (3562662653).

The spelling of 1021331452 in words is "one billion, twenty-one million, three hundred thirty-one thousand, four hundred fifty-two".