4012405 has 8 divisors (see below), whose sum is σ = 4865112. Its totient is φ = 3176448.

The previous prime is 4012381. The next prime is 4012441. The reversal of 4012405 is 5042104.

It can be written as a sum of positive squares in 4 ways, for example, as 707281 + 3305124 = 841^2 + 1818^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4012405 - 2¹³ = 4004213 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 7 ways as a sum of consecutive naturals, for example, 3652 + ... + 4621.

It is an arithmetic number, because the mean of its divisors is an integer number (608139).

Almost surely, 2^4012405 is an apocalyptic number.

It is an amenable number.

4012405 is a deficient number, since it is larger than the sum of its proper divisors (852707).

4012405 is an equidigital number, since it uses as much as digits as its factorization.

4012405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8375.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 4012405 is about 2003.0988492833. The cubic root of 4012405 is about 158.9040334364.

Adding to 4012405 its reverse (5042104), we get a palindrome (9054509).

The spelling of 4012405 in words is "four million, twelve thousand, four hundred five".