2491385 has 8 divisors (see below), whose sum is σ = 3219720. Its totient is φ = 1839744.

The previous prime is 2491381. The next prime is 2491387. The reversal of 2491385 is 5831942.

2491385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 32761 + 2458624 = 181^2 + 1568^2 .

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 2491385 - 2² = 2491381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2491381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19100 + ... + 19229.

It is an arithmetic number, because the mean of its divisors is an integer number (402465).

2^2491385 is an apocalyptic number.

It is an amenable number.

2491385 is a deficient number, since it is larger than the sum of its proper divisors (728335).

2491385 is a wasteful number, since it uses less digits than its factorization.

2491385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38347.

The product of its digits is 8640, while the sum is 32.

The square root of 2491385 is about 1578.4121768410. The cubic root of 2491385 is about 135.5648033595.

It can be divided in two parts, 249 and 1385, that multiplied together give a triangular number (344865 = T₈₃₀).

The spelling of 2491385 in words is "two million, four hundred ninety-one thousand, three hundred eighty-five".