140042301506 has 4 divisors (see below), whose sum is σ = 210063452262. Its totient is φ = 70021150752.

The previous prime is 140042301481. The next prime is 140042301517. The reversal of 140042301506 is 605103240041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605103240041 = 103651 ⋅5837891.

It can be written as a sum of positive squares in only one way, i.e., 85594279225 + 54448022281 = 292565^2 + 233341^2 .

It is a super-2 number, since 2×140042301506² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35010575375 + ... + 35010575378.

Almost surely, 2^140042301506 is an apocalyptic number.

140042301506 is a deficient number, since it is larger than the sum of its proper divisors (70021150756).

140042301506 is an equidigital number, since it uses as much as digits as its factorization.

140042301506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70021150755.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 140042301506 its reverse (605103240041), we get a palindrome (745145541547).

The spelling of 140042301506 in words is "one hundred forty billion, forty-two million, three hundred one thousand, five hundred six".