561142999 has 8 divisors (see below), whose sum is σ = 578400128. Its totient is φ = 543996000.

The previous prime is 561142969. The next prime is 561143027. The reversal of 561142999 is 999241165.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561142999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561142909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17127 + ... + 37624.

It is an arithmetic number, because the mean of its divisors is an integer number (72300016).

Almost surely, 2^561142999 is an apocalyptic number.

561142999 is a deficient number, since it is larger than the sum of its proper divisors (17257129).

561142999 is a wasteful number, since it uses less digits than its factorization.

561142999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55065.

The product of its digits is 174960, while the sum is 46.

The square root of 561142999 is about 23688.4570835671. The cubic root of 561142999 is about 824.8174675452.

The spelling of 561142999 in words is "five hundred sixty-one million, one hundred forty-two thousand, nine hundred ninety-nine".