10520421 has 8 divisors (see below), whose sum is σ = 14044800. Its totient is φ = 7004832.

The previous prime is 10520401. The next prime is 10520429. The reversal of 10520421 is 12402501.

10520421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10520421 - 2⁹ = 10519909 is a prime.

It is a super-2 number, since 2×10520421² = 221358516034482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10520421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10520429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476 + ... + 4818.

It is an arithmetic number, because the mean of its divisors is an integer number (1755600).

Almost surely, 2^10520421 is an apocalyptic number.

It is an amenable number.

10520421 is a deficient number, since it is larger than the sum of its proper divisors (3524379).

10520421 is a wasteful number, since it uses less digits than its factorization.

10520421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 10520421 is about 3243.5198473264. The cubic root of 10520421 is about 219.1178240484.

Adding to 10520421 its reverse (12402501), we get a palindrome (22922922).

The spelling of 10520421 in words is "ten million, five hundred twenty thousand, four hundred twenty-one".