345121401 has 4 divisors (see below), whose sum is σ = 460161872. Its totient is φ = 230080932.

The previous prime is 345121391. The next prime is 345121411. The reversal of 345121401 is 104121543.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104121543 = 3 ⋅34707181.

It is an interprime number because it is at equal distance from previous prime (345121391) and next prime (345121411).

It is not a de Polignac number, because 345121401 - 2²⁷ = 210903673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (345121411) 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, 57520231 + ... + 57520236.

It is an arithmetic number, because the mean of its divisors is an integer number (115040468).

Almost surely, 2^345121401 is an apocalyptic number.

It is an amenable number.

345121401 is a deficient number, since it is larger than the sum of its proper divisors (115040471).

345121401 is a wasteful number, since it uses less digits than its factorization.

345121401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115040470.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 345121401 is about 18577.4433386298. The cubic root of 345121401 is about 701.4401649356.

Adding to 345121401 its reverse (104121543), we get a palindrome (449242944).

The spelling of 345121401 in words is "three hundred forty-five million, one hundred twenty-one thousand, four hundred one".