2551845 has 8 divisors (see below), whose sum is σ = 4082976. Its totient is φ = 1360976.

The previous prime is 2551841. The next prime is 2551859. The reversal of 2551845 is 5481552.

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 2551845 - 2² = 2551841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551841) 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, 85047 + ... + 85076.

It is an arithmetic number, because the mean of its divisors is an integer number (510372).

2^2551845 is an apocalyptic number.

It is an amenable number.

2551845 is a deficient number, since it is larger than the sum of its proper divisors (1531131).

2551845 is a wasteful number, since it uses less digits than its factorization.

2551845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170131.

The product of its digits is 8000, while the sum is 30.

The square root of 2551845 is about 1597.4495297192. The cubic root of 2551845 is about 136.6526623234.

The spelling of 2551845 in words is "two million, five hundred fifty-one thousand, eight hundred forty-five".