2636945 has 8 divisors (see below), whose sum is σ = 3197544. Its totient is φ = 2087424.

The previous prime is 2636939. The next prime is 2636957. The reversal of 2636945 is 5496362.

It can be written as a sum of positive squares in 4 ways, for example, as 274576 + 2362369 = 524^2 + 1537^2 .

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 2636945 - 2⁴ = 2636929 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2 + 6⁶ + 3¹² + 6⁶ + 9⁵ + 4² + 5⁹ .

It is a Duffinian 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, 2234 + ... + 3203.

It is an arithmetic number, because the mean of its divisors is an integer number (399693).

2^2636945 is an apocalyptic number.

It is an amenable number.

2636945 is a deficient number, since it is larger than the sum of its proper divisors (560599).

2636945 is an equidigital number, since it uses as much as digits as its factorization.

2636945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5539.

The product of its digits is 38880, while the sum is 35.

The square root of 2636945 is about 1623.8672975339. The cubic root of 2636945 is about 138.1551325509.

The spelling of 2636945 in words is "two million, six hundred thirty-six thousand, nine hundred forty-five".