612161 has 16 divisors (see below), whose sum is σ = 734400. Its totient is φ = 504000.

The previous prime is 612149. The next prime is 612169. The reversal of 612161 is 161216.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 612161 - 2¹⁰ = 611137 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6011 + ... + 6111.

It is an arithmetic number, because the mean of its divisors is an integer number (45900).

2⁶¹²¹⁶¹ is an apocalyptic number.

It is an amenable number.

612161 is a deficient number, since it is larger than the sum of its proper divisors (122239).

612161 is a wasteful number, since it uses less digits than its factorization.

612161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160.

The product of its digits is 72, while the sum is 17.

The square root of 612161 is about 782.4071829936. The cubic root of 612161 is about 84.9092919316.

Adding to 612161 its reverse (161216), we get a palindrome (773377).

It can be divided in two parts, 61 and 2161, that added together give a palindrome (2222).

The spelling of 612161 in words is "six hundred twelve thousand, one hundred sixty-one".