9039421 has 4 divisors (see below), whose sum is σ = 9515200. Its totient is φ = 8563644.

The previous prime is 9039419. The next prime is 9039431. The reversal of 9039421 is 1249309.

It is a happy number.

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: 1249309 = 641 ⋅1949.

It is a cyclic number.

It is not a de Polignac number, because 9039421 - 2¹ = 9039419 is a prime.

It is a super-2 number, since 2×9039421² = 163422264030482, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9039421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9039431) 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, 237861 + ... + 237898.

It is an arithmetic number, because the mean of its divisors is an integer number (2378800).

Almost surely, 2^9039421 is an apocalyptic number.

It is an amenable number.

9039421 is a deficient number, since it is larger than the sum of its proper divisors (475779).

9039421 is a wasteful number, since it uses less digits than its factorization.

9039421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475778.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 9039421 is about 3006.5629878650. The cubic root of 9039421 is about 208.3116399101.

The spelling of 9039421 in words is "nine million, thirty-nine thousand, four hundred twenty-one".