140021422 has 4 divisors (see below), whose sum is σ = 210032136. Its totient is φ = 70010710.

The previous prime is 140021411. The next prime is 140021423. The reversal of 140021422 is 224120041.

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

It is a junction number, because it is equal to n+sod(n) for n = 140021396 and 140021405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140021423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35005354 + ... + 35005357.

It is an arithmetic number, because the mean of its divisors is an integer number (52508034).

Almost surely, 2^140021422 is an apocalyptic number.

140021422 is a deficient number, since it is larger than the sum of its proper divisors (70010714).

140021422 is an equidigital number, since it uses as much as digits as its factorization.

140021422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70010713.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 140021422 is about 11833.0647762953. The cubic root of 140021422 is about 519.2758930269.

Adding to 140021422 its reverse (224120041), we get a palindrome (364141463).

It can be divided in two parts, 1400 and 21422, that added together give a palindrome (22822).

The spelling of 140021422 in words is "one hundred forty million, twenty-one thousand, four hundred twenty-two".