340121251 has 4 divisors (see below), whose sum is σ = 351849600. Its totient is φ = 328392904.

The previous prime is 340121233. The next prime is 340121273. The reversal of 340121251 is 152121043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 340121251 - 2⁵ = 340121219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340121231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5864131 + ... + 5864188.

It is an arithmetic number, because the mean of its divisors is an integer number (87962400).

Almost surely, 2^340121251 is an apocalyptic number.

340121251 is a deficient number, since it is larger than the sum of its proper divisors (11728349).

340121251 is a wasteful number, since it uses less digits than its factorization.

340121251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11728348.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 340121251 is about 18442.3765008743. The cubic root of 340121251 is about 698.0361629909.

Adding to 340121251 its reverse (152121043), we get a palindrome (492242294).

The spelling of 340121251 in words is "three hundred forty million, one hundred twenty-one thousand, two hundred fifty-one".