345041561 has 4 divisors (see below), whose sum is σ = 360043392. Its totient is φ = 330039732.

The previous prime is 345041533. The next prime is 345041573. The reversal of 345041561 is 165140543.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-345041561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345041531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7500881 + ... + 7500926.

It is an arithmetic number, because the mean of its divisors is an integer number (90010848).

Almost surely, 2^345041561 is an apocalyptic number.

It is an amenable number.

345041561 is a deficient number, since it is larger than the sum of its proper divisors (15001831).

345041561 is a wasteful number, since it uses less digits than its factorization.

345041561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15001830.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 345041561 is about 18575.2943718263. The cubic root of 345041561 is about 701.3860706356.

The spelling of 345041561 in words is "three hundred forty-five million, forty-one thousand, five hundred sixty-one".