987405 has 8 divisors (see below), whose sum is σ = 1579872. Its totient is φ = 526608.

The previous prime is 987391. The next prime is 987433. The reversal of 987405 is 504789.

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

It is not a de Polignac number, because 987405 - 2¹⁴ = 971021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32899 + ... + 32928.

It is an arithmetic number, because the mean of its divisors is an integer number (197484).

2⁹⁸⁷⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

987405 is a deficient number, since it is larger than the sum of its proper divisors (592467).

987405 is a wasteful number, since it uses less digits than its factorization.

987405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65835.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 987405 is about 993.6825448804. The cubic root of 987405 is about 99.5783916286.

It can be divided in two parts, 98 and 7405, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 987405 in words is "nine hundred eighty-seven thousand, four hundred five".