140242442 has 4 divisors (see below), whose sum is σ = 210363666. Its totient is φ = 70121220.

The previous prime is 140242441. The next prime is 140242447. The reversal of 140242442 is 244242041.

140242442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244242041 = 13693 ⋅17837.

It can be written as a sum of positive squares in only one way, i.e., 99780121 + 40462321 = 9989^2 + 6361^2 .

It is not an unprimeable number, because it can be changed into a prime (140242441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35060609 + ... + 35060612.

Almost surely, 2^140242442 is an apocalyptic number.

140242442 is a deficient number, since it is larger than the sum of its proper divisors (70121224).

140242442 is an equidigital number, since it uses as much as digits as its factorization.

140242442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70121223.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 140242442 is about 11842.4001790178. The cubic root of 140242442 is about 519.5489703457.

Adding to 140242442 its reverse (244242041), we get a palindrome (384484483).

The spelling of 140242442 in words is "one hundred forty million, two hundred forty-two thousand, four hundred forty-two".