561407542 has 4 divisors (see below), whose sum is σ = 842111316. Its totient is φ = 280703770.

The previous prime is 561407537. The next prime is 561407543. The reversal of 561407542 is 245704165.

561407542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 561407498 and 561407507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561407543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140351884 + ... + 140351887.

It is an arithmetic number, because the mean of its divisors is an integer number (210527829).

Almost surely, 2^561407542 is an apocalyptic number.

561407542 is a deficient number, since it is larger than the sum of its proper divisors (280703774).

561407542 is a wasteful number, since it uses less digits than its factorization.

561407542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280703773.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 561407542 is about 23694.0402211189. The cubic root of 561407542 is about 824.9470633925.

The spelling of 561407542 in words is "five hundred sixty-one million, four hundred seven thousand, five hundred forty-two".