2112405 has 8 divisors (see below), whose sum is σ = 3379872. Its totient is φ = 1126608.

The previous prime is 2112353. The next prime is 2112413. The reversal of 2112405 is 5042112.

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

It is not a de Polignac number, because 2112405 - 2¹³ = 2104213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 140827 = 2112405 / (2 + 1 + 1 + 2 + 4 + 0 + 5).

It is a Curzon number.

2112405 is a lucky number.

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, 70399 + ... + 70428.

It is an arithmetic number, because the mean of its divisors is an integer number (422484).

2^2112405 is an apocalyptic number.

It is an amenable number.

2112405 is a deficient number, since it is larger than the sum of its proper divisors (1267467).

2112405 is a wasteful number, since it uses less digits than its factorization.

2112405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140835.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2112405 is about 1453.4115040139. The cubic root of 2112405 is about 128.3095737578.

Adding to 2112405 its reverse (5042112), we get a palindrome (7154517).

The spelling of 2112405 in words is "two million, one hundred twelve thousand, four hundred five".