140121523 has 16 divisors (see below), whose sum is σ = 151672320. Its totient is φ = 129028896.

The previous prime is 140121521. The next prime is 140121551. The reversal of 140121523 is 325121041.

It is a cyclic number.

It is not a de Polignac number, because 140121523 - 2¹ = 140121521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 140121523.

It is not an unprimeable number, because it can be changed into a prime (140121521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154036 + ... + 154942.

It is an arithmetic number, because the mean of its divisors is an integer number (9479520).

Almost surely, 2^140121523 is an apocalyptic number.

140121523 is a deficient number, since it is larger than the sum of its proper divisors (11550797).

140121523 is a wasteful number, since it uses less digits than its factorization.

140121523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 140121523 is about 11837.2937363233. The cubic root of 140121523 is about 519.3996066072.

Adding to 140121523 its reverse (325121041), we get a palindrome (465242564).

The spelling of 140121523 in words is "one hundred forty million, one hundred twenty-one thousand, five hundred twenty-three".