1043253021 has 16 divisors (see below), whose sum is σ = 1453211136. Its totient is φ = 664470576.

The previous prime is 1043253019. The next prime is 1043253041. The reversal of 1043253021 is 1203523401.

It is not a de Polignac number, because 1043253021 - 2¹ = 1043253019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043253011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52366 + ... + 69488.

It is an arithmetic number, because the mean of its divisors is an integer number (90825696).

Almost surely, 2^1043253021 is an apocalyptic number.

It is an amenable number.

1043253021 is a deficient number, since it is larger than the sum of its proper divisors (409958115).

1043253021 is a wasteful number, since it uses less digits than its factorization.

1043253021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18032.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1043253021 is about 32299.4275645870. The cubic root of 1043253021 is about 1014.2146597271.

Adding to 1043253021 its reverse (1203523401), we get a palindrome (2246776422).

The spelling of 1043253021 in words is "one billion, forty-three million, two hundred fifty-three thousand, twenty-one".