561451 has 8 divisors (see below), whose sum is σ = 627264. Its totient is φ = 498120.

The previous prime is 561439. The next prime is 561461. The reversal of 561451 is 154165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561451 - 2⁵ = 561419 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (561461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 1066.

It is an arithmetic number, because the mean of its divisors is an integer number (78408).

2⁵⁶¹⁴⁵¹ is an apocalyptic number.

561451 is a deficient number, since it is larger than the sum of its proper divisors (65813).

561451 is a wasteful number, since it uses less digits than its factorization.

561451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241.

The product of its digits is 600, while the sum is 22.

The square root of 561451 is about 749.3003403176. The cubic root of 561451 is about 82.4968348954.

It can be divided in two parts, 5614 and 51, that added together give a palindrome (5665).

The spelling of 561451 in words is "five hundred sixty-one thousand, four hundred fifty-one".