561237874 has 4 divisors (see below), whose sum is σ = 841856814. Its totient is φ = 280618936.

The previous prime is 561237823. The next prime is 561237917. The reversal of 561237874 is 478732165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478732165 = 5 ⋅95746433.

It can be written as a sum of positive squares in only one way, i.e., 515607849 + 45630025 = 22707^2 + 6755^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 561237874.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140309467 + ... + 140309470.

Almost surely, 2^561237874 is an apocalyptic number.

561237874 is a deficient number, since it is larger than the sum of its proper divisors (280618940).

561237874 is a wasteful number, since it uses less digits than its factorization.

561237874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280618939.

The product of its digits is 282240, while the sum is 43.

The square root of 561237874 is about 23690.4595565388. The cubic root of 561237874 is about 824.8639501396.

The spelling of 561237874 in words is "five hundred sixty-one million, two hundred thirty-seven thousand, eight hundred seventy-four".