210402 has 12 divisors (see below), whose sum is σ = 455910. Its totient is φ = 70128.

The previous prime is 210401. The next prime is 210403. The reversal of 210402 is 204012.

It is an interprime number because it is at equal distance from previous prime (210401) and next prime (210403).

It can be written as a sum of positive squares in only one way, i.e., 114921 + 95481 = 339^2 + 309^2 .

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

It is not an unprimeable number, because it can be changed into a prime (210401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5827 + ... + 5862.

2²¹⁰⁴⁰² is an apocalyptic number.

210402 is an abundant number, since it is smaller than the sum of its proper divisors (245508).

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

210402 is a wasteful number, since it uses less digits than its factorization.

210402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11697 (or 11694 counting only the distinct ones).

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

The square root of 210402 is about 458.6959777456. The cubic root of 210402 is about 59.4771232347.

Adding to 210402 its reverse (204012), we get a palindrome (414414).

It can be divided in two parts, 2 and 10402, that added together give a square (10404 = 102²).

The spelling of 210402 in words is "two hundred ten thousand, four hundred two", and thus it is an iban number.