561254 has 4 divisors (see below), whose sum is σ = 841884. Its totient is φ = 280626.

The previous prime is 561251. The next prime is 561277. The reversal of 561254 is 452165.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140312 + ... + 140315.

It is an arithmetic number, because the mean of its divisors is an integer number (210471).

2⁵⁶¹²⁵⁴ is an apocalyptic number.

561254 is a deficient number, since it is larger than the sum of its proper divisors (280630).

561254 is a wasteful number, since it uses less digits than its factorization.

561254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280629.

The product of its digits is 1200, while the sum is 23.

The square root of 561254 is about 749.1688728184. The cubic root of 561254 is about 82.4871850312.

The spelling of 561254 in words is "five hundred sixty-one thousand, two hundred fifty-four".