2489785 has 4 divisors (see below), whose sum is σ = 2987748. Its totient is φ = 1991824.

The previous prime is 2489777. The next prime is 2489789. The reversal of 2489785 is 5879842.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1297321 + 1192464 = 1139^2 + 1092^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489785 - 2³ = 2489777 is a prime.

It is a Duffinian number.

2489785 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2489789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248974 + ... + 248983.

It is an arithmetic number, because the mean of its divisors is an integer number (746937).

2^2489785 is an apocalyptic number.

It is an amenable number.

2489785 is a deficient number, since it is larger than the sum of its proper divisors (497963).

2489785 is an equidigital number, since it uses as much as digits as its factorization.

2489785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497962.

The product of its digits is 161280, while the sum is 43.

The square root of 2489785 is about 1577.9052569784. The cubic root of 2489785 is about 135.5357766488.

The spelling of 2489785 in words is "two million, four hundred eighty-nine thousand, seven hundred eighty-five".