612761 has 4 divisors (see below), whose sum is σ = 615012. Its totient is φ = 610512.

The previous prime is 612751. The next prime is 612763. The reversal of 612761 is 167216.

612761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 198025 + 414736 = 445^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 612761 - 2¹⁸ = 350617 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 (612763) 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, 650 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (153753).

2⁶¹²⁷⁶¹ is an apocalyptic number.

It is an amenable number.

612761 is a deficient number, since it is larger than the sum of its proper divisors (2251).

612761 is a wasteful number, since it uses less digits than its factorization.

612761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250.

The product of its digits is 504, while the sum is 23.

The square root of 612761 is about 782.7905211485. The cubic root of 612761 is about 84.9370237101.

Adding to 612761 its reverse (167216), we get a palindrome (779977).

The spelling of 612761 in words is "six hundred twelve thousand, seven hundred sixty-one".