181402 has 8 divisors (see below), whose sum is σ = 293076. Its totient is φ = 83712.

The previous prime is 181399. The next prime is 181409. The reversal of 181402 is 204181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 159201 + 22201 = 399^2 + 149^2 .

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

It is not an unprimeable number, because it can be changed into a prime (181409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3463 + ... + 3514.

2¹⁸¹⁴⁰² is an apocalyptic number.

181402 is a deficient number, since it is larger than the sum of its proper divisors (111674).

181402 is a wasteful number, since it uses less digits than its factorization.

181402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 181402 is about 425.9131366840. The cubic root of 181402 is about 56.6083752751.

Adding to 181402 its reverse (204181), we get a palindrome (385583).

The spelling of 181402 in words is "one hundred eighty-one thousand, four hundred two".