2628561 has 8 divisors (see below), whose sum is σ = 3774400. Its totient is φ = 1617552.

The previous prime is 2628559. The next prime is 2628581. The reversal of 2628561 is 1658262.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2628561 - 2¹ = 2628559 is a prime.

It is a Duffinian number.

2628561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2628541) 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, 33661 + ... + 33738.

It is an arithmetic number, because the mean of its divisors is an integer number (471800).

2^2628561 is an apocalyptic number.

It is an amenable number.

2628561 is a deficient number, since it is larger than the sum of its proper divisors (1145839).

2628561 is a wasteful number, since it uses less digits than its factorization.

2628561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67415.

The product of its digits is 5760, while the sum is 30.

The square root of 2628561 is about 1621.2837506125. The cubic root of 2628561 is about 138.0085585954.

Subtracting from 2628561 its reverse (1658262), we obtain a cube (970299 = 99³).

The spelling of 2628561 in words is "two million, six hundred twenty-eight thousand, five hundred sixty-one".