87071257 has 16 divisors (see below), whose sum is σ = 108771712. Its totient is φ = 67858560.

The previous prime is 87071251. The next prime is 87071269. The reversal of 87071257 is 75217078.

It is not a de Polignac number, because 87071257 - 2¹¹ = 87069209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87071251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044 + ... + 13237.

It is an arithmetic number, because the mean of its divisors is an integer number (6798232).

Almost surely, 2^87071257 is an apocalyptic number.

It is an amenable number.

87071257 is a deficient number, since it is larger than the sum of its proper divisors (21700455).

87071257 is a wasteful number, since it uses less digits than its factorization.

87071257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14368.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 87071257 is about 9331.1980474106. The cubic root of 87071257 is about 443.2257035475.

It can be divided in two parts, 870 and 71257, that added together give a palindrome (72127).

The spelling of 87071257 in words is "eighty-seven million, seventy-one thousand, two hundred fifty-seven".