87015257 has 8 divisors (see below), whose sum is σ = 100847232. Its totient is φ = 73533600.

The previous prime is 87015239. The next prime is 87015259. The reversal of 87015257 is 75251078.

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

It is not a de Polignac number, because 87015257 - 2¹⁰ = 87014233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87015259) 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, 87044 + ... + 88037.

It is an arithmetic number, because the mean of its divisors is an integer number (12605904).

Almost surely, 2^87015257 is an apocalyptic number.

It is an amenable number.

87015257 is a deficient number, since it is larger than the sum of its proper divisors (13831975).

87015257 is a wasteful number, since it uses less digits than its factorization.

87015257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175159.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 87015257 is about 9328.1968782825. The cubic root of 87015257 is about 443.1306627602.

The spelling of 87015257 in words is "eighty-seven million, fifteen thousand, two hundred fifty-seven".