400034121 has 24 divisors (see below), whose sum is σ = 551769120. Its totient is φ = 257789952.

The previous prime is 400034119. The next prime is 400034143. The reversal of 400034121 is 121430004.

It is not a de Polignac number, because 400034121 - 2¹ = 400034119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400034121.

It is not an unprimeable number, because it can be changed into a prime (400034221) 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 23 ways as a sum of consecutive naturals, for example, 1055310 + ... + 1055688.

It is an arithmetic number, because the mean of its divisors is an integer number (22990380).

Almost surely, 2^400034121 is an apocalyptic number.

It is an amenable number.

400034121 is a deficient number, since it is larger than the sum of its proper divisors (151734999).

400034121 is a wasteful number, since it uses less digits than its factorization.

400034121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 400034121 is about 20000.8530068095. The cubic root of 400034121 is about 736.8272496055.

Adding to 400034121 its reverse (121430004), we get a palindrome (521464125).

The spelling of 400034121 in words is "four hundred million, thirty-four thousand, one hundred twenty-one".