561127906 has 4 divisors (see below), whose sum is σ = 841691862. Its totient is φ = 280563952.

The previous prime is 561127901. The next prime is 561127921. The reversal of 561127906 is 609721165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609721165 = 5 ⋅121944233.

It can be written as a sum of positive squares in only one way, i.e., 416527281 + 144600625 = 20409^2 + 12025^2 .

It is not an unprimeable number, because it can be changed into a prime (561127901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140281975 + ... + 140281978.

Almost surely, 2^561127906 is an apocalyptic number.

561127906 is a deficient number, since it is larger than the sum of its proper divisors (280563956).

561127906 is a wasteful number, since it uses less digits than its factorization.

561127906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280563955.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 561127906 is about 23688.1385085447. The cubic root of 561127906 is about 824.8100724714.

The spelling of 561127906 in words is "five hundred sixty-one million, one hundred twenty-seven thousand, nine hundred six".