87042405 has 24 divisors (see below), whose sum is σ = 141753312. Its totient is φ = 45608416.

The previous prime is 87042391. The next prime is 87042407. The reversal of 87042405 is 50424078.

It is a de Polignac number, because none of the positive numbers 2^k-87042405 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87042407) 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 23 ways as a sum of consecutive naturals, for example, 51382 + ... + 53048.

It is an arithmetic number, because the mean of its divisors is an integer number (5906388).

Almost surely, 2^87042405 is an apocalyptic number.

It is an amenable number.

87042405 is a deficient number, since it is larger than the sum of its proper divisors (54710907).

87042405 is a wasteful number, since it uses less digits than its factorization.

87042405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793 (or 1734 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 87042405 is about 9329.6519227675. The cubic root of 87042405 is about 443.1767422669.

The spelling of 87042405 in words is "eighty-seven million, forty-two thousand, four hundred five".