421002 has 24 divisors (see below), whose sum is σ = 960960. Its totient is φ = 132840.

The previous prime is 420997. The next prime is 421009. The reversal of 421002 is 200124.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274 + ... + 957.

It is an arithmetic number, because the mean of its divisors is an integer number (40040).

2⁴²¹⁰⁰² is an apocalyptic number.

421002 is an abundant number, since it is smaller than the sum of its proper divisors (539958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421002 is a wasteful number, since it uses less digits than its factorization.

421002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 421002 is about 648.8466690983. The cubic root of 421002 is about 74.9482309411.

Adding to 421002 its reverse (200124), we get a palindrome (621126).

The spelling of 421002 in words is "four hundred twenty-one thousand, two", and thus it is an iban number.