82701257 has 4 divisors (see below), whose sum is σ = 83352576. Its totient is φ = 82049940.

The previous prime is 82701221. The next prime is 82701287. The reversal of 82701257 is 75210728.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82701257 - 2⁸ = 82701001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82701287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325469 + ... + 325722.

It is an arithmetic number, because the mean of its divisors is an integer number (20838144).

Almost surely, 2^82701257 is an apocalyptic number.

It is an amenable number.

82701257 is a deficient number, since it is larger than the sum of its proper divisors (651319).

82701257 is a wasteful number, since it uses less digits than its factorization.

82701257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651318.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 82701257 is about 9094.0231471005. The cubic root of 82701257 is about 435.6830893624.

The spelling of 82701257 in words is "eighty-two million, seven hundred one thousand, two hundred fifty-seven".