345730121 has 4 divisors (see below), whose sum is σ = 377160144. Its totient is φ = 314300100.

The previous prime is 345730093. The next prime is 345730123. The reversal of 345730121 is 121037543.

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 345730121 - 2¹⁴ = 345713737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345730123) 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, 15714995 + ... + 15715016.

It is an arithmetic number, because the mean of its divisors is an integer number (94290036).

Almost surely, 2^345730121 is an apocalyptic number.

It is an amenable number.

345730121 is a deficient number, since it is larger than the sum of its proper divisors (31430023).

345730121 is a wasteful number, since it uses less digits than its factorization.

345730121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31430022.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 345730121 is about 18593.8194301225. The cubic root of 345730121 is about 701.8523192941.

Adding to 345730121 its reverse (121037543), we get a palindrome (466767664).

The spelling of 345730121 in words is "three hundred forty-five million, seven hundred thirty thousand, one hundred twenty-one".