561371 has 4 divisors (see below), whose sum is σ = 564072. Its totient is φ = 558672.

The previous prime is 561367. The next prime is 561373. The reversal of 561371 is 173165.

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

It is a cyclic number.

It is not a de Polignac number, because 561371 - 2² = 561367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010 + ... + 1463.

It is an arithmetic number, because the mean of its divisors is an integer number (141018).

2⁵⁶¹³⁷¹ is an apocalyptic number.

561371 is a deficient number, since it is larger than the sum of its proper divisors (2701).

561371 is a wasteful number, since it uses less digits than its factorization.

561371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2700.

The product of its digits is 630, while the sum is 23.

The square root of 561371 is about 749.2469552824. The cubic root of 561371 is about 82.4929164411.

The spelling of 561371 in words is "five hundred sixty-one thousand, three hundred seventy-one".