140322257 has 4 divisors (see below), whose sum is σ = 140868516. Its totient is φ = 139776000.

The previous prime is 140322253. The next prime is 140322317. The reversal of 140322257 is 752223041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752223041 = 5261 ⋅142981.

It can be written as a sum of positive squares in 2 ways, for example, as 136515856 + 3806401 = 11684^2 + 1951^2 .

It is a cyclic number.

It is not a de Polignac number, because 140322257 - 2² = 140322253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140322253) 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 3 ways as a sum of consecutive naturals, for example, 272744 + ... + 273257.

It is an arithmetic number, because the mean of its divisors is an integer number (35217129).

Almost surely, 2^140322257 is an apocalyptic number.

It is an amenable number.

140322257 is a deficient number, since it is larger than the sum of its proper divisors (546259).

140322257 is an equidigital number, since it uses as much as digits as its factorization.

140322257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546258.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 140322257 is about 11845.7695824290. The cubic root of 140322257 is about 519.6475138304.

Adding to 140322257 its reverse (752223041), we get a palindrome (892545298).

The spelling of 140322257 in words is "one hundred forty million, three hundred twenty-two thousand, two hundred fifty-seven".