612012257 has 4 divisors (see below), whose sum is σ = 648012996. Its totient is φ = 576011520.

The previous prime is 612012209. The next prime is 612012299. The reversal of 612012257 is 752210216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 226321936 + 385690321 = 15044^2 + 19639^2 .

It is a cyclic number.

It is not a de Polignac number, because 612012257 - 2¹² = 612008161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612012157) 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 in 3 ways as a sum of consecutive naturals, for example, 18000344 + ... + 18000377.

It is an arithmetic number, because the mean of its divisors is an integer number (162003249).

Almost surely, 2^612012257 is an apocalyptic number.

It is an amenable number.

612012257 is a deficient number, since it is larger than the sum of its proper divisors (36000739).

612012257 is a wasteful number, since it uses less digits than its factorization.

612012257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36000738.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 612012257 is about 24738.8814823953. The cubic root of 612012257 is about 849.0241428242.

The spelling of 612012257 in words is "six hundred twelve million, twelve thousand, two hundred fifty-seven".