561243254 has 36 divisors (see below), whose sum is σ = 1002085308. Its totient is φ = 235469520.

The previous prime is 561243247. The next prime is 561243259. The reversal of 561243254 is 452342165.

It is a self number, because there is not a number n which added to its sum of digits gives 561243254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561243259) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34037 + ... + 47759.

It is an arithmetic number, because the mean of its divisors is an integer number (27835703).

Almost surely, 2^561243254 is an apocalyptic number.

561243254 is a deficient number, since it is larger than the sum of its proper divisors (440842054).

561243254 is a wasteful number, since it uses less digits than its factorization.

561243254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13773 (or 13749 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 561243254 is about 23690.5731040851. The cubic root of 561243254 is about 824.8665858336.

The spelling of 561243254 in words is "five hundred sixty-one million, two hundred forty-three thousand, two hundred fifty-four".