340212641 has 2 divisors, whose sum is σ = 340212642. Its totient is φ = 340212640.

The previous prime is 340212637. The next prime is 340212661. The reversal of 340212641 is 146212043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300017041 + 40195600 = 17321^2 + 6340^2 .

It is an emirp because it is prime and its reverse (146212043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340212641 - 2² = 340212637 is a prime.

It is a super-3 number, since 3×340212641³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340212661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170106320 + 170106321.

It is an arithmetic number, because the mean of its divisors is an integer number (170106321).

Almost surely, 2^340212641 is an apocalyptic number.

It is an amenable number.

340212641 is a deficient number, since it is larger than the sum of its proper divisors (1).

340212641 is an equidigital number, since it uses as much as digits as its factorization.

340212641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 340212641 is about 18444.8540520114. The cubic root of 340212641 is about 698.0986777675.

Adding to 340212641 its reverse (146212043), we get a palindrome (486424684).

The spelling of 340212641 in words is "three hundred forty million, two hundred twelve thousand, six hundred forty-one".