561339247 has 24 divisors (see below), whose sum is σ = 673712640. Its totient is φ = 465998400.

The previous prime is 561339239. The next prime is 561339293. The reversal of 561339247 is 742933165.

It is a happy number.

It is not a de Polignac number, because 561339247 - 2³ = 561339239 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 (561339347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 487122 + ... + 488272.

It is an arithmetic number, because the mean of its divisors is an integer number (28071360).

Almost surely, 2^561339247 is an apocalyptic number.

561339247 is a deficient number, since it is larger than the sum of its proper divisors (112373393).

561339247 is a wasteful number, since it uses less digits than its factorization.

561339247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1464 counting only the distinct ones).

The product of its digits is 136080, while the sum is 40.

The square root of 561339247 is about 23692.5989920903. The cubic root of 561339247 is about 824.9136105439.

The spelling of 561339247 in words is "five hundred sixty-one million, three hundred thirty-nine thousand, two hundred forty-seven".