712642057 has 4 divisors (see below), whose sum is σ = 754562196. Its totient is φ = 670721920.

The previous prime is 712642039. The next prime is 712642093. The reversal of 712642057 is 750246217.

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 254211136 + 458430921 = 15944^2 + 21411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-712642057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712642157) 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, 20960044 + ... + 20960077.

It is an arithmetic number, because the mean of its divisors is an integer number (188640549).

Almost surely, 2^712642057 is an apocalyptic number.

It is an amenable number.

712642057 is a deficient number, since it is larger than the sum of its proper divisors (41920139).

712642057 is a wasteful number, since it uses less digits than its factorization.

712642057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41920138.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 712642057 is about 26695.3564688693. The cubic root of 712642057 is about 893.2173486675.

The spelling of 712642057 in words is "seven hundred twelve million, six hundred forty-two thousand, fifty-seven".