140246257 has 8 divisors (see below), whose sum is σ = 141258312. Its totient is φ = 139238400.

The previous prime is 140246237. The next prime is 140246273. The reversal of 140246257 is 752642041.

It can be written as a sum of positive squares in 4 ways, for example, as 14447601 + 125798656 = 3801^2 + 11216^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140246257 - 2⁷ = 140246129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140246207) 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 7 ways as a sum of consecutive naturals, for example, 93957 + ... + 95437.

It is an arithmetic number, because the mean of its divisors is an integer number (17657289).

Almost surely, 2^140246257 is an apocalyptic number.

It is an amenable number.

140246257 is a deficient number, since it is larger than the sum of its proper divisors (1012055).

140246257 is a wasteful number, since it uses less digits than its factorization.

140246257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 140246257 is about 11842.5612516888. The cubic root of 140246257 is about 519.5536813812.

Adding to 140246257 its reverse (752642041), we get a palindrome (892888298).

The spelling of 140246257 in words is "one hundred forty million, two hundred forty-six thousand, two hundred fifty-seven".