2140297 has 4 divisors (see below), whose sum is σ = 2145940. Its totient is φ = 2134656.

The previous prime is 2140279. The next prime is 2140301. The reversal of 2140297 is 7920412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2013561 + 126736 = 1419^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140297 - 2⁷ = 2140169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208 + ... + 3025.

It is an arithmetic number, because the mean of its divisors is an integer number (536485).

2^2140297 is an apocalyptic number.

It is an amenable number.

2140297 is a deficient number, since it is larger than the sum of its proper divisors (5643).

2140297 is an equidigital number, since it uses as much as digits as its factorization.

2140297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2140297 is about 1462.9753928211. The cubic root of 2140297 is about 128.8718355306.

The spelling of 2140297 in words is "two million, one hundred forty thousand, two hundred ninety-seven".