10002421 has 16 divisors (see below), whose sum is σ = 11874240. Its totient is φ = 8305920.

The previous prime is 10002407. The next prime is 10002431. The reversal of 10002421 is 12420001.

It is a cyclic number.

It is not a de Polignac number, because 10002421 - 2¹⁵ = 9969653 is a prime.

It is a super-2 number, since 2×10002421² = 200096851722482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002398 and 10002407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002431) 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, 15850 + ... + 16468.

It is an arithmetic number, because the mean of its divisors is an integer number (742140).

Almost surely, 2^10002421 is an apocalyptic number.

10002421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10002421 is a deficient number, since it is larger than the sum of its proper divisors (1871819).

10002421 is a wasteful number, since it uses less digits than its factorization.

10002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 10002421 is about 3162.6604307134. The cubic root of 10002421 is about 215.4608538883.

Adding to 10002421 its reverse (12420001), we get a palindrome (22422422).

The spelling of 10002421 in words is "ten million, two thousand, four hundred twenty-one".