561172834 has 4 divisors (see below), whose sum is σ = 841759254. Its totient is φ = 280586416.

The previous prime is 561172817. The next prime is 561172849. The reversal of 561172834 is 438271165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 438271165 = 5 ⋅87654233.

It can be written as a sum of positive squares in only one way, i.e., 542657025 + 18515809 = 23295^2 + 4303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 561172793 and 561172802.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 140293207 + ... + 140293210.

Almost surely, 2^561172834 is an apocalyptic number.

561172834 is a deficient number, since it is larger than the sum of its proper divisors (280586420).

561172834 is a wasteful number, since it uses less digits than its factorization.

561172834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280586419.

The product of its digits is 40320, while the sum is 37.

The square root of 561172834 is about 23689.0868122855. The cubic root of 561172834 is about 824.8320853242.

The spelling of 561172834 in words is "five hundred sixty-one million, one hundred seventy-two thousand, eight hundred thirty-four".