2261405 has 8 divisors (see below), whose sum is σ = 2771712. Its totient is φ = 1770448.

The previous prime is 2261393. The next prime is 2261407. The reversal of 2261405 is 5041622.

It is a happy number.

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 2261405 - 2¹² = 2257309 is a prime.

It is a super-2 number, since 2×2261405² = 10227905148050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4577 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (346464).

2^2261405 is an apocalyptic number.

It is an amenable number.

2261405 is a deficient number, since it is larger than the sum of its proper divisors (510307).

2261405 is an equidigital number, since it uses as much as digits as its factorization.

2261405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9675.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2261405 is about 1503.7968612815. The cubic root of 2261405 is about 131.2581007850.

The spelling of 2261405 in words is "two million, two hundred sixty-one thousand, four hundred five".