140720215 has 4 divisors (see below), whose sum is σ = 168864264. Its totient is φ = 112576168.

The previous prime is 140720201. The next prime is 140720227. The reversal of 140720215 is 512027041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512027041 = 1973 ⋅259517.

It is a cyclic number.

It is not a de Polignac number, because 140720215 - 2⁵ = 140720183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 14072017 + ... + 14072026.

It is an arithmetic number, because the mean of its divisors is an integer number (42216066).

Almost surely, 2^140720215 is an apocalyptic number.

140720215 is a deficient number, since it is larger than the sum of its proper divisors (28144049).

140720215 is an equidigital number, since it uses as much as digits as its factorization.

140720215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28144048.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 140720215 is about 11862.5551632016. Note that the first 3 decimals coincide. The cubic root of 140720215 is about 520.1382953173.

Adding to 140720215 its reverse (512027041), we get a palindrome (652747256).

The spelling of 140720215 in words is "one hundred forty million, seven hundred twenty thousand, two hundred fifteen".