140145442 has 8 divisors (see below), whose sum is σ = 212147100. Its totient is φ = 69429744.

The previous prime is 140145431. The next prime is 140145443. The reversal of 140145442 is 244541041.

It can be written as a sum of positive squares in 2 ways, for example, as 126090441 + 14055001 = 11229^2 + 3749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (140145443) 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, 321217 + ... + 321652.

Almost surely, 2^140145442 is an apocalyptic number.

140145442 is a deficient number, since it is larger than the sum of its proper divisors (72001658).

140145442 is a wasteful number, since it uses less digits than its factorization.

140145442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642980.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 140145442 is about 11838.3040170457. The cubic root of 140145442 is about 519.4291590797.

Adding to 140145442 its reverse (244541041), we get a palindrome (384686483).

The spelling of 140145442 in words is "one hundred forty million, one hundred forty-five thousand, four hundred forty-two".