140402523 has 4 divisors (see below), whose sum is σ = 187203368. Its totient is φ = 93601680.

The previous prime is 140402519. The next prime is 140402527. The reversal of 140402523 is 325204041.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (140402519) and next prime (140402527).

It is not a de Polignac number, because 140402523 - 2² = 140402519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140402523.

It is not an unprimeable number, because it can be changed into a prime (140402527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23400418 + ... + 23400423.

It is an arithmetic number, because the mean of its divisors is an integer number (46800842).

Almost surely, 2^140402523 is an apocalyptic number.

140402523 is a deficient number, since it is larger than the sum of its proper divisors (46800845).

140402523 is an equidigital number, since it uses as much as digits as its factorization.

140402523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46800844.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 140402523 is about 11849.1570586266. The cubic root of 140402523 is about 519.7465764640.

Adding to 140402523 its reverse (325204041), we get a palindrome (465606564).

The spelling of 140402523 in words is "one hundred forty million, four hundred two thousand, five hundred twenty-three".