612642461 has 2 divisors, whose sum is σ = 612642462. Its totient is φ = 612642460.

The previous prime is 612642341. The next prime is 612642463. The reversal of 612642461 is 164246216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611622361 + 1020100 = 24731^2 + 1010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612642461 is a prime.

Together with 612642463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612642463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306321230 + 306321231.

It is an arithmetic number, because the mean of its divisors is an integer number (306321231).

Almost surely, 2^612642461 is an apocalyptic number.

It is an amenable number.

612642461 is a deficient number, since it is larger than the sum of its proper divisors (1).

612642461 is an equidigital number, since it uses as much as digits as its factorization.

612642461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 612642461 is about 24751.6153210250. The cubic root of 612642461 is about 849.3154631670.

Adding to 612642461 its reverse (164246216), we get a palindrome (776888677).

The spelling of 612642461 in words is "six hundred twelve million, six hundred forty-two thousand, four hundred sixty-one".