612561 has 8 divisors (see below), whose sum is σ = 864864. Its totient is φ = 384320.

The previous prime is 612553. The next prime is 612583. The reversal of 612561 is 165216.

It is a happy number.

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 612561 - 2³ = 612553 is a prime.

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

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 612561.

It is not an unprimeable number, because it can be changed into a prime (612511) 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, 5955 + ... + 6056.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2⁶¹²⁵⁶¹ is an apocalyptic number.

It is an amenable number.

612561 is a deficient number, since it is larger than the sum of its proper divisors (252303).

612561 is a wasteful number, since it uses less digits than its factorization.

612561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12031.

The product of its digits is 360, while the sum is 21.

The square root of 612561 is about 782.6627626251. The cubic root of 612561 is about 84.9277817962.

Adding to 612561 its reverse (165216), we get a palindrome (777777).

The spelling of 612561 in words is "six hundred twelve thousand, five hundred sixty-one".