340404121 has 4 divisors (see below), whose sum is σ = 342306000. Its totient is φ = 338502244.

The previous prime is 340404109. The next prime is 340404131. The reversal of 340404121 is 121404043.

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 340404121 - 2⁷ = 340403993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340404131) 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 3 ways as a sum of consecutive naturals, for example, 950671 + ... + 951028.

It is an arithmetic number, because the mean of its divisors is an integer number (85576500).

Almost surely, 2^340404121 is an apocalyptic number.

It is an amenable number.

340404121 is a deficient number, since it is larger than the sum of its proper divisors (1901879).

340404121 is a wasteful number, since it uses less digits than its factorization.

340404121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901878.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 340404121 is about 18450.0439294870. The cubic root of 340404121 is about 698.2296222109.

Adding to 340404121 its reverse (121404043), we get a palindrome (461808164).

The spelling of 340404121 in words is "three hundred forty million, four hundred four thousand, one hundred twenty-one".