1023974521 has 4 divisors (see below), whose sum is σ = 1024354944. Its totient is φ = 1023594100.

The previous prime is 1023974509. The next prime is 1023974531. The reversal of 1023974521 is 1254793201.

It is a happy number.

1023974521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1254793201 = 16189 ⋅77509.

It is a cyclic number.

It is not a de Polignac number, because 1023974521 - 2¹⁷ = 1023843449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023974531) 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, 186145 + ... + 191566.

It is an arithmetic number, because the mean of its divisors is an integer number (256088736).

Almost surely, 2^1023974521 is an apocalyptic number.

It is an amenable number.

1023974521 is a deficient number, since it is larger than the sum of its proper divisors (380423).

1023974521 is an equidigital number, since it uses as much as digits as its factorization.

1023974521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380422.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1023974521 is about 31999.6018881485. The cubic root of 1023974521 is about 1007.9284800735.

The spelling of 1023974521 in words is "one billion, twenty-three million, nine hundred seventy-four thousand, five hundred twenty-one".