1002421 has 8 divisors (see below), whose sum is σ = 1206080. Its totient is φ = 813888.

The previous prime is 1002403. The next prime is 1002427. The reversal of 1002421 is 1242001.

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

It is a cyclic number.

It is not a de Polignac number, because 1002421 - 2¹³ = 994229 is a prime.

It is a super-2 number, since 2×1002421² = 2009695722482, 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 = 1002398 and 1002407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3636 + ... + 3901.

It is an arithmetic number, because the mean of its divisors is an integer number (150760).

2^1002421 is an apocalyptic number.

It is an amenable number.

1002421 is a deficient number, since it is larger than the sum of its proper divisors (203659).

1002421 is an equidigital number, since it uses as much as digits as its factorization.

1002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7563.

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

The square root of 1002421 is about 1001.2097682304. The cubic root of 1002421 is about 100.0806349626.

Adding to 1002421 its reverse (1242001), we get a palindrome (2244422).

The spelling of 1002421 in words is "one million, two thousand, four hundred twenty-one".