2722405 has 8 divisors (see below), whose sum is σ = 3733632. Its totient is φ = 1866768.

The previous prime is 2722399. The next prime is 2722417. The reversal of 2722405 is 5042272.

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 2722405 - 2¹⁵ = 2689637 is a prime.

It is a super-2 number, since 2×2722405² = 14822977968050, which contains 22 as substring.

It is an Ulam 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, 38857 + ... + 38926.

It is an arithmetic number, because the mean of its divisors is an integer number (466704).

2^2722405 is an apocalyptic number.

It is an amenable number.

2722405 is a deficient number, since it is larger than the sum of its proper divisors (1011227).

2722405 is an equidigital number, since it uses as much as digits as its factorization.

2722405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77795.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 2722405 is about 1649.9712118701. The cubic root of 2722405 is about 139.6317704228.

Adding to 2722405 its reverse (5042272), we get a palindrome (7764677).

The spelling of 2722405 in words is "two million, seven hundred twenty-two thousand, four hundred five".