2401605 has 24 divisors (see below), whose sum is σ = 4219488. Its totient is φ = 1263456.

The previous prime is 2401603. The next prime is 2401621. The reversal of 2401605 is 5061042.

It is a happy number.

It is not a de Polignac number, because 2401605 - 2¹ = 2401603 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2401603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3414 + ... + 4056.

It is an arithmetic number, because the mean of its divisors is an integer number (175812).

2^2401605 is an apocalyptic number.

It is an amenable number.

2401605 is a deficient number, since it is larger than the sum of its proper divisors (1817883).

2401605 is a wasteful number, since it uses less digits than its factorization.

2401605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2401605 is about 1549.7112634294. The cubic root of 2401605 is about 133.9164289182.

Adding to 2401605 its reverse (5061042), we get a palindrome (7462647).

The spelling of 2401605 in words is "two million, four hundred one thousand, six hundred five".