611872 has 12 divisors (see below), whose sum is σ = 1204686. Its totient is φ = 305920.

The previous prime is 611839. The next prime is 611873. The reversal of 611872 is 278116.

It can be written as a sum of positive squares in only one way, i.e., 414736 + 197136 = 644^2 + 444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611873) by changing a digit.

611872 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 9529 + ... + 9592.

2⁶¹¹⁸⁷² is an apocalyptic number.

It is an amenable number.

611872 is a deficient number, since it is larger than the sum of its proper divisors (592814).

611872 is a wasteful number, since it uses less digits than its factorization.

611872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19131 (or 19123 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The square root of 611872 is about 782.2224747474. Note that the first 3 decimals coincide. The cubic root of 611872 is about 84.8959279920.

Adding to 611872 its reverse (278116), we get a palindrome (889988).

The spelling of 611872 in words is "six hundred eleven thousand, eight hundred seventy-two".