9520421 has 4 divisors (see below), whose sum is σ = 9540000. Its totient is φ = 9500844.

The previous prime is 9520411. The next prime is 9520429. The reversal of 9520421 is 1240259.

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: 1240259 = 233 ⋅5323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9520421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9520429) 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, 9041 + ... + 10038.

It is an arithmetic number, because the mean of its divisors is an integer number (2385000).

Almost surely, 2^9520421 is an apocalyptic number.

It is an amenable number.

9520421 is a deficient number, since it is larger than the sum of its proper divisors (19579).

9520421 is a wasteful number, since it uses less digits than its factorization.

9520421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19578.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 9520421 is about 3085.5179467960. The cubic root of 9520421 is about 211.9428245601.

The spelling of 9520421 in words is "nine million, five hundred twenty thousand, four hundred twenty-one".