40342121 has 8 divisors (see below), whose sum is σ = 41291904. Its totient is φ = 39396240.

The previous prime is 40342117. The next prime is 40342123. The reversal of 40342121 is 12124304.

40342121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40342121 - 2² = 40342117 is a prime.

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 40342121.

It is not an unprimeable number, because it can be changed into a prime (40342123) 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 in 7 ways as a sum of consecutive naturals, for example, 33866 + ... + 35036.

It is an arithmetic number, because the mean of its divisors is an integer number (5161488).

Almost surely, 2^40342121 is an apocalyptic number.

It is an amenable number.

40342121 is a deficient number, since it is larger than the sum of its proper divisors (949783).

40342121 is a wasteful number, since it uses less digits than its factorization.

40342121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40342121 is about 6351.5447727305. The cubic root of 40342121 is about 342.9674537822.

Adding to 40342121 its reverse (12124304), we get a palindrome (52466425).

It can be divided in two parts, 403 and 42121, that added together give a palindrome (42524).

The spelling of 40342121 in words is "forty million, three hundred forty-two thousand, one hundred twenty-one".