10508421 has 16 divisors (see below), whose sum is σ = 17468928. Its totient is φ = 5458800.

The previous prime is 10508359. The next prime is 10508461. The reversal of 10508421 is 12480501.

It is not a de Polignac number, because 10508421 - 2⁶ = 10508357 is a prime.

It is a super-4 number, since 4×10508421⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10508461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22515 + ... + 22976.

It is an arithmetic number, because the mean of its divisors is an integer number (1091808).

Almost surely, 2^10508421 is an apocalyptic number.

10508421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10508421 is a deficient number, since it is larger than the sum of its proper divisors (6960507).

10508421 is a wasteful number, since it uses less digits than its factorization.

10508421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45512.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 10508421 is about 3241.6694772910. The cubic root of 10508421 is about 219.0344809243.

Adding to 10508421 its reverse (12480501), we get a palindrome (22988922).

The spelling of 10508421 in words is "ten million, five hundred eight thousand, four hundred twenty-one".