140221243 has 4 divisors (see below), whose sum is σ = 140996128. Its totient is φ = 139446360.

The previous prime is 140221223. The next prime is 140221259. The reversal of 140221243 is 342122041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342122041 = 4861 ⋅70381.

It is a cyclic number.

It is not a de Polignac number, because 140221243 - 2²⁵ = 106666811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140221243.

It is not an unprimeable number, because it can be changed into a prime (140221223) 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, 387171 + ... + 387532.

It is an arithmetic number, because the mean of its divisors is an integer number (35249032).

Almost surely, 2^140221243 is an apocalyptic number.

140221243 is a deficient number, since it is larger than the sum of its proper divisors (774885).

140221243 is an equidigital number, since it uses as much as digits as its factorization.

140221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774884.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140221243 is about 11841.5050985928. The cubic root of 140221243 is about 519.5227907445.

Adding to 140221243 its reverse (342122041), we get a palindrome (482343284).

The spelling of 140221243 in words is "one hundred forty million, two hundred twenty-one thousand, two hundred forty-three".