612491 has 4 divisors (see below), whose sum is σ = 668184. Its totient is φ = 556800.

The previous prime is 612481. The next prime is 612497. The reversal of 612491 is 194216.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 612491 - 2¹⁰ = 611467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612497) 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, 27830 + ... + 27851.

It is an arithmetic number, because the mean of its divisors is an integer number (167046).

2⁶¹²⁴⁹¹ is an apocalyptic number.

612491 is a deficient number, since it is larger than the sum of its proper divisors (55693).

612491 is a wasteful number, since it uses less digits than its factorization.

612491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55692.

The product of its digits is 432, while the sum is 23.

The square root of 612491 is about 782.6180422147. The cubic root of 612491 is about 84.9245466511.

It can be divided in two parts, 61 and 2491, that added together give a palindrome (2552).

The spelling of 612491 in words is "six hundred twelve thousand, four hundred ninety-one".