140243434 has 4 divisors (see below), whose sum is σ = 210365154. Its totient is φ = 70121716.

The previous prime is 140243417. The next prime is 140243437. The reversal of 140243434 is 434342041.

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

It can be written as a sum of positive squares in only one way, i.e., 116575209 + 23668225 = 10797^2 + 4865^2 .

It is a super-2 number, since 2×140243434² = 39336441560224712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140243399 and 140243408.

It is not an unprimeable number, because it can be changed into a prime (140243437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35060857 + ... + 35060860.

Almost surely, 2^140243434 is an apocalyptic number.

140243434 is a deficient number, since it is larger than the sum of its proper divisors (70121720).

140243434 is an equidigital number, since it uses as much as digits as its factorization.

140243434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70121719.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 140243434 is about 11842.4420623451. The cubic root of 140243434 is about 519.5501953467.

Adding to 140243434 its reverse (434342041), we get a palindrome (574585475).

The spelling of 140243434 in words is "one hundred forty million, two hundred forty-three thousand, four hundred thirty-four".