140442321 has 16 divisors (see below), whose sum is σ = 198720000. Its totient is φ = 87921408.

The previous prime is 140442299. The next prime is 140442359. The reversal of 140442321 is 123244041.

It is not a de Polignac number, because 140442321 - 2²² = 136248017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140442371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21555 + ... + 27303.

It is an arithmetic number, because the mean of its divisors is an integer number (12420000).

Almost surely, 2^140442321 is an apocalyptic number.

It is an amenable number.

140442321 is a deficient number, since it is larger than the sum of its proper divisors (58277679).

140442321 is a wasteful number, since it uses less digits than its factorization.

140442321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6248.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 140442321 is about 11850.8362996035. The cubic root of 140442321 is about 519.7956803303.

Adding to 140442321 its reverse (123244041), we get a palindrome (263686362).

The spelling of 140442321 in words is "one hundred forty million, four hundred forty-two thousand, three hundred twenty-one".