340420121 has 16 divisors (see below), whose sum is σ = 371219904. Its totient is φ = 310915584.

The previous prime is 340420081. The next prime is 340420123. The reversal of 340420121 is 121024043.

It is not a de Polignac number, because 340420121 - 2⁶ = 340420057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 340420121.

It is not an unprimeable number, because it can be changed into a prime (340420123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117725 + ... + 120581.

It is an arithmetic number, because the mean of its divisors is an integer number (23201244).

Almost surely, 2^340420121 is an apocalyptic number.

It is an amenable number.

340420121 is a deficient number, since it is larger than the sum of its proper divisors (30799783).

340420121 is a wasteful number, since it uses less digits than its factorization.

340420121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080.

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

The square root of 340420121 is about 18450.4775276956. The cubic root of 340420121 is about 698.2405616583.

Adding to 340420121 its reverse (121024043), we get a palindrome (461444164).

The spelling of 340420121 in words is "three hundred forty million, four hundred twenty thousand, one hundred twenty-one".