612511321 has 4 divisors (see below), whose sum is σ = 639142272. Its totient is φ = 585880372.

The previous prime is 612511279. The next prime is 612511327. The reversal of 612511321 is 123115216.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 612511321 - 2¹¹ = 612509273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 612511292 and 612511301.

It is not an unprimeable number, because it can be changed into a prime (612511327) 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, 13315441 + ... + 13315486.

It is an arithmetic number, because the mean of its divisors is an integer number (159785568).

Almost surely, 2^612511321 is an apocalyptic number.

It is an amenable number.

612511321 is a deficient number, since it is larger than the sum of its proper divisors (26630951).

612511321 is a wasteful number, since it uses less digits than its factorization.

612511321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26630950.

The product of its digits is 360, while the sum is 22.

The square root of 612511321 is about 24748.9660592114. The cubic root of 612511321 is about 849.2548583907.

Adding to 612511321 its reverse (123115216), we get a palindrome (735626537).

The spelling of 612511321 in words is "six hundred twelve million, five hundred eleven thousand, three hundred twenty-one".