140506442 has 4 divisors (see below), whose sum is σ = 210759666. Its totient is φ = 70253220.

The previous prime is 140506439. The next prime is 140506447. The reversal of 140506442 is 244605041.

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., 110901961 + 29604481 = 10531^2 + 5441^2 .

It is not an unprimeable number, because it can be changed into a prime (140506447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35126609 + ... + 35126612.

Almost surely, 2^140506442 is an apocalyptic number.

140506442 is a deficient number, since it is larger than the sum of its proper divisors (70253224).

140506442 is an equidigital number, since it uses as much as digits as its factorization.

140506442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70253223.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 140506442 is about 11853.5413273840. The cubic root of 140506442 is about 519.8747750729.

The spelling of 140506442 in words is "one hundred forty million, five hundred six thousand, four hundred forty-two".