400140122 has 4 divisors (see below), whose sum is σ = 600210186. Its totient is φ = 200070060.

The previous prime is 400140121. The next prime is 400140137. The reversal of 400140122 is 221041004.

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., 390892441 + 9247681 = 19771^2 + 3041^2 .

It is a super-2 number, since 2×400140122² = 320224234468349768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400140097 and 400140106.

It is not an unprimeable number, because it can be changed into a prime (400140121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100035029 + ... + 100035032.

Almost surely, 2^400140122 is an apocalyptic number.

400140122 is a deficient number, since it is larger than the sum of its proper divisors (200070064).

400140122 is a wasteful number, since it uses less digits than its factorization.

400140122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200070063.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 400140122 is about 20003.5027432697. The cubic root of 400140122 is about 736.8923253274.

Adding to 400140122 its reverse (221041004), we get a palindrome (621181126).

The spelling of 400140122 in words is "four hundred million, one hundred forty thousand, one hundred twenty-two".