140257297 has 4 divisors (see below), whose sum is σ = 147639280. Its totient is φ = 132875316.

The previous prime is 140257291. The next prime is 140257339. The reversal of 140257297 is 792752041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140257297 - 2¹⁵ = 140224529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140257291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3690963 + ... + 3691000.

It is an arithmetic number, because the mean of its divisors is an integer number (36909820).

Almost surely, 2^140257297 is an apocalyptic number.

It is an amenable number.

140257297 is a deficient number, since it is larger than the sum of its proper divisors (7381983).

140257297 is an equidigital number, since it uses as much as digits as its factorization.

140257297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7381982.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 140257297 is about 11843.0273579014. The cubic root of 140257297 is about 519.5673138832.

The spelling of 140257297 in words is "one hundred forty million, two hundred fifty-seven thousand, two hundred ninety-seven".