71012657 has 8 divisors (see below), whose sum is σ = 73151976. Its totient is φ = 68884992.

The previous prime is 71012653. The next prime is 71012681. The reversal of 71012657 is 75621017.

It can be written as a sum of positive squares in 4 ways, for example, as 23001616 + 48011041 = 4796^2 + 6929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71012657 - 2² = 71012653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71012653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10343 + ... + 15779.

It is an arithmetic number, because the mean of its divisors is an integer number (9143997).

Almost surely, 2^71012657 is an apocalyptic number.

It is an amenable number.

71012657 is a deficient number, since it is larger than the sum of its proper divisors (2139319).

71012657 is a wasteful number, since it uses less digits than its factorization.

71012657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5827.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 71012657 is about 8426.9007944795. The cubic root of 71012657 is about 414.1063792691.

The spelling of 71012657 in words is "seventy-one million, twelve thousand, six hundred fifty-seven".