1033165421 has 4 divisors (see below), whose sum is σ = 1055147712. Its totient is φ = 1011183132.

The previous prime is 1033165417. The next prime is 1033165433. The reversal of 1033165421 is 1245613301.

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: 1245613301 = 673 ⋅1850837.

It is a cyclic number.

It is not a de Polignac number, because 1033165421 - 2² = 1033165417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1033165321) 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, 10991075 + ... + 10991168.

It is an arithmetic number, because the mean of its divisors is an integer number (263786928).

Almost surely, 2^1033165421 is an apocalyptic number.

It is an amenable number.

1033165421 is a deficient number, since it is larger than the sum of its proper divisors (21982291).

1033165421 is an equidigital number, since it uses as much as digits as its factorization.

1033165421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21982290.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1033165421 is about 32142.8906758555. The cubic root of 1033165421 is about 1010.9351274575.

Adding to 1033165421 its reverse (1245613301), we get a palindrome (2278778722).

The spelling of 1033165421 in words is "one billion, thirty-three million, one hundred sixty-five thousand, four hundred twenty-one".