40122881 has 4 divisors (see below), whose sum is σ = 40688064. Its totient is φ = 39557700.

The previous prime is 40122877. The next prime is 40122923. The reversal of 40122881 is 18822104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40122881 - 2² = 40122877 is a prime.

It is a super-2 number, since 2×40122881² = 3219691159480322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40122881.

It is not an unprimeable number, because it can be changed into a prime (40122821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282485 + ... + 282626.

It is an arithmetic number, because the mean of its divisors is an integer number (10172016).

Almost surely, 2^40122881 is an apocalyptic number.

It is an amenable number.

40122881 is a deficient number, since it is larger than the sum of its proper divisors (565183).

40122881 is an equidigital number, since it uses as much as digits as its factorization.

40122881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565182.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 40122881 is about 6334.2624669333. The cubic root of 40122881 is about 342.3450372562.

Adding to 40122881 its reverse (18822104), we get a palindrome (58944985).

The spelling of 40122881 in words is "forty million, one hundred twenty-two thousand, eight hundred eighty-one".