87142605 has 16 divisors (see below), whose sum is σ = 152103744. Its totient is φ = 42250880.

The previous prime is 87142603. The next prime is 87142621. The reversal of 87142605 is 50624178.

It is not a de Polignac number, because 87142605 - 2¹ = 87142603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87142603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263904 + ... + 264233.

It is an arithmetic number, because the mean of its divisors is an integer number (9506484).

Almost surely, 2^87142605 is an apocalyptic number.

It is an amenable number.

87142605 is a deficient number, since it is larger than the sum of its proper divisors (64961139).

87142605 is a wasteful number, since it uses less digits than its factorization.

87142605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528156.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 87142605 is about 9335.0203534861. The cubic root of 87142605 is about 443.3467332838.

The spelling of 87142605 in words is "eighty-seven million, one hundred forty-two thousand, six hundred five".