11142405 has 12 divisors (see below), whose sum is σ = 19313580. Its totient is φ = 5942592.

The previous prime is 11142401. The next prime is 11142413. The reversal of 11142405 is 50424111.

It can be written as a sum of positive squares in 2 ways, for example, as 2196324 + 8946081 = 1482^2 + 2991^2 .

It is not a de Polignac number, because 11142405 - 2² = 11142401 is a prime.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123760 + ... + 123849.

It is an arithmetic number, because the mean of its divisors is an integer number (1609465).

Almost surely, 2^11142405 is an apocalyptic number.

11142405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11142405 is a deficient number, since it is larger than the sum of its proper divisors (8171175).

11142405 is a wasteful number, since it uses less digits than its factorization.

11142405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247620 (or 247617 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 11142405 is about 3338.0241161502. The cubic root of 11142405 is about 223.3536119306.

Adding to 11142405 its reverse (50424111), we get a palindrome (61566516).

The spelling of 11142405 in words is "eleven million, one hundred forty-two thousand, four hundred five".