87481257 has 8 divisors (see below), whose sum is σ = 116875584. Its totient is φ = 58203888.

The previous prime is 87481231. The next prime is 87481267. The reversal of 87481257 is 75218478.

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

It is not a de Polignac number, because 87481257 - 2¹¹ = 87479209 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (87481267) 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, 27478 + ... + 30495.

It is an arithmetic number, because the mean of its divisors is an integer number (14609448).

Almost surely, 2^87481257 is an apocalyptic number.

It is an amenable number.

87481257 is a deficient number, since it is larger than the sum of its proper divisors (29394327).

87481257 is a wasteful number, since it uses less digits than its factorization.

87481257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58479.

The product of its digits is 125440, while the sum is 42.

The square root of 87481257 is about 9353.1415577869. The cubic root of 87481257 is about 443.9202995892.

The spelling of 87481257 in words is "eighty-seven million, four hundred eighty-one thousand, two hundred fifty-seven".