131402 has 4 divisors (see below), whose sum is σ = 197106. Its totient is φ = 65700.

The previous prime is 131381. The next prime is 131413. The reversal of 131402 is 204131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204131 = 29 ⋅7039.

It can be written as a sum of positive squares in only one way, i.e., 78961 + 52441 = 281^2 + 229^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 131402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32849 + ... + 32852.

2¹³¹⁴⁰² is an apocalyptic number.

131402 is a deficient number, since it is larger than the sum of its proper divisors (65704).

131402 is an equidigital number, since it uses as much as digits as its factorization.

131402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65703.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 131402 is about 362.4941378836. The cubic root of 131402 is about 50.8394283354.

Adding to 131402 its reverse (204131), we get a palindrome (335533).

The spelling of 131402 in words is "one hundred thirty-one thousand, four hundred two".