11287405 has 24 divisors (see below), whose sum is σ = 14891688. Its totient is φ = 8183808.

The previous prime is 11287399. The next prime is 11287417. The reversal of 11287405 is 50478211.

It can be written as a sum of positive squares in 12 ways, for example, as 145161 + 11142244 = 381^2 + 3338^2 .

It is not a de Polignac number, because 11287405 - 2¹⁵ = 11254637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116317 + ... + 116413.

It is an arithmetic number, because the mean of its divisors is an integer number (620487).

Almost surely, 2^11287405 is an apocalyptic number.

It is an amenable number.

11287405 is a deficient number, since it is larger than the sum of its proper divisors (3604283).

11287405 is an equidigital number, since it uses as much as digits as its factorization.

11287405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 11287405 is about 3359.6733472170. The cubic root of 11287405 is about 224.3182988192.

The spelling of 11287405 in words is "eleven million, two hundred eighty-seven thousand, four hundred five".