140402 has 4 divisors (see below), whose sum is σ = 210606. Its totient is φ = 70200.

The previous prime is 140401. The next prime is 140407. The reversal of 140402 is 204041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204041 = 19 ⋅10739.

It can be written as a sum of positive squares in only one way, i.e., 96721 + 43681 = 311^2 + 209^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140402.

It is not an unprimeable number, because it can be changed into a prime (140401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35099 + ... + 35102.

2¹⁴⁰⁴⁰² is an apocalyptic number.

140402 is a deficient number, since it is larger than the sum of its proper divisors (70204).

140402 is an equidigital number, since it uses as much as digits as its factorization.

140402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70203.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 140402 is about 374.7025486970. The cubic root of 140402 is about 51.9745931111.

Adding to 140402 its reverse (204041), we get a palindrome (344443).

It can be divided in two parts, 140 and 402, that multiplied together give a triangular number (56280 = T₃₃₅).

The spelling of 140402 in words is "one hundred forty thousand, four hundred two", and thus it is an iban number.