2553605 has 8 divisors (see below), whose sum is σ = 3084792. Its totient is φ = 2029248.

The previous prime is 2553601. The next prime is 2553611. The reversal of 2553605 is 5063552.

It is a Cunningham number, because it is equal to 1598²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 749956 + 1803649 = 866^2 + 1343^2 .

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 2553605 - 2² = 2553601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553601) 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, 842 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (385599).

2^2553605 is an apocalyptic number.

It is an amenable number.

2553605 is a deficient number, since it is larger than the sum of its proper divisors (531187).

2553605 is a wasteful number, since it uses less digits than its factorization.

2553605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 2553605 is about 1598.0003128911. Note that the first 3 decimals coincide. The cubic root of 2553605 is about 136.6840714168.

The spelling of 2553605 in words is "two million, five hundred fifty-three thousand, six hundred five".