342745561 has 4 divisors (see below), whose sum is σ = 350716432. Its totient is φ = 334774692.

The previous prime is 342745553. The next prime is 342745589. The reversal of 342745561 is 165547243.

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: 165547243 = 647 ⋅255869.

It is a cyclic number.

It is not a de Polignac number, because 342745561 - 2³ = 342745553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 342745561.

It is not an unprimeable number, because it can be changed into a prime (342745531) 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, 3985371 + ... + 3985456.

It is an arithmetic number, because the mean of its divisors is an integer number (87679108).

Almost surely, 2^342745561 is an apocalyptic number.

It is an amenable number.

342745561 is a deficient number, since it is larger than the sum of its proper divisors (7970871).

342745561 is an equidigital number, since it uses as much as digits as its factorization.

342745561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7970870.

The product of its digits is 100800, while the sum is 37.

The square root of 342745561 is about 18513.3886957521. The cubic root of 342745561 is about 699.8268694281.

The spelling of 342745561 in words is "three hundred forty-two million, seven hundred forty-five thousand, five hundred sixty-one".