612132547321 has 3 divisors (see below), whose sum is σ = 612133329711. Its totient is φ = 612131764932.

The previous prime is 612132547307. The next prime is 612132547331. The reversal of 612132547321 is 123745231216.

The square root of 612132547321 is 782389.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 476015823721 + 136116723600 = 689939^2 + 368940^2 .

It is not a de Polignac number, because 612132547321 - 2¹⁹ = 612132023033 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612132547331) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 391195 + ... + 1173583.

It is an arithmetic number, because the mean of its divisors is an integer number (204044443237).

Almost surely, 2^612132547321 is an apocalyptic number.

612132547321 is the 782389-th square number.

612132547321 is the 391195-th centered octagonal number.

It is an amenable number.

612132547321 is a deficient number, since it is larger than the sum of its proper divisors (782390).

612132547321 is an frugal number, since it uses more digits than its factorization.

612132547321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564778 (or 782389 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

Adding to 612132547321 its reverse (123745231216), we get a palindrome (735877778537).

The spelling of 612132547321 in words is "six hundred twelve billion, one hundred thirty-two million, five hundred forty-seven thousand, three hundred twenty-one".