40121005 has 8 divisors (see below), whose sum is σ = 48180600. Its totient is φ = 32073216.

The previous prime is 40120991. The next prime is 40121009. The reversal of 40121005 is 50012104.

It can be written as a sum of positive squares in 4 ways, for example, as 5299204 + 34821801 = 2302^2 + 5901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40121005 - 2¹⁹ = 39596717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40121009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8761 + ... + 12529.

It is an arithmetic number, because the mean of its divisors is an integer number (6022575).

Almost surely, 2^40121005 is an apocalyptic number.

It is an amenable number.

40121005 is a deficient number, since it is larger than the sum of its proper divisors (8059595).

40121005 is a wasteful number, since it uses less digits than its factorization.

40121005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 40121005 is about 6334.1143816638. The cubic root of 40121005 is about 342.3397015700.

Adding to 40121005 its reverse (50012104), we get a palindrome (90133109).

The spelling of 40121005 in words is "forty million, one hundred twenty-one thousand, five".