140040442 has 4 divisors (see below), whose sum is σ = 210060666. Its totient is φ = 70020220.

The previous prime is 140040437. The next prime is 140040457. The reversal of 140040442 is 244040041.

140040442 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.

It can be written as a sum of positive squares in only one way, i.e., 112593321 + 27447121 = 10611^2 + 5239^2 .

It is a super-2 number, since 2×140040442² = 39222650791110728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35010109 + ... + 35010112.

Almost surely, 2^140040442 is an apocalyptic number.

140040442 is a deficient number, since it is larger than the sum of its proper divisors (70020224).

140040442 is an equidigital number, since it uses as much as digits as its factorization.

140040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70020223.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 140040442 is about 11833.8684292162. The cubic root of 140040442 is about 519.2994041444.

Adding to 140040442 its reverse (244040041), we get a palindrome (384080483).

The spelling of 140040442 in words is "one hundred forty million, forty thousand, four hundred forty-two".