1087405 has 16 divisors (see below), whose sum is σ = 1508544. Its totient is φ = 743680.

The previous prime is 1087391. The next prime is 1087409. The reversal of 1087405 is 5047801.

It is not a de Polignac number, because 1087405 - 2⁹ = 1086893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1087405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087409) 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 15 ways as a sum of consecutive naturals, for example, 354 + ... + 1516.

It is an arithmetic number, because the mean of its divisors is an integer number (94284).

2^1087405 is an apocalyptic number.

It is an amenable number.

1087405 is a deficient number, since it is larger than the sum of its proper divisors (421139).

1087405 is a wasteful number, since it uses less digits than its factorization.

1087405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1087405 is about 1042.7871307223. The cubic root of 1087405 is about 102.8325112793.

The spelling of 1087405 in words is "one million, eighty-seven thousand, four hundred five".