612551 has 4 divisors (see below), whose sum is σ = 625632. Its totient is φ = 599472.

The previous prime is 612511. The next prime is 612553. The reversal of 612551 is 155216.

612551 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612553) 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, 6470 + ... + 6563.

It is an arithmetic number, because the mean of its divisors is an integer number (156408).

2⁶¹²⁵⁵¹ is an apocalyptic number.

612551 is a deficient number, since it is larger than the sum of its proper divisors (13081).

612551 is a wasteful number, since it uses less digits than its factorization.

612551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13080.

The product of its digits is 300, while the sum is 20.

The square root of 612551 is about 782.6563741515. The cubic root of 612551 is about 84.9273196477.

Adding to 612551 its reverse (155216), we get a palindrome (767767).

The spelling of 612551 in words is "six hundred twelve thousand, five hundred fifty-one".