340212405 has 16 divisors (see below), whose sum is σ = 586212480. Its totient is φ = 167489088.

The previous prime is 340212401. The next prime is 340212407. The reversal of 340212405 is 504212043.

It is not a de Polignac number, because 340212405 - 2² = 340212401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340212401) 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, 872145 + ... + 872534.

It is an arithmetic number, because the mean of its divisors is an integer number (36638280).

Almost surely, 2^340212405 is an apocalyptic number.

It is an amenable number.

340212405 is a deficient number, since it is larger than the sum of its proper divisors (246000075).

340212405 is a wasteful number, since it uses less digits than its factorization.

340212405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744700.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 340212405 is about 18444.8476545620. The cubic root of 340212405 is about 698.0985163476.

Adding to 340212405 its reverse (504212043), we get a palindrome (844424448).

The spelling of 340212405 in words is "three hundred forty million, two hundred twelve thousand, four hundred five".