2489621 has 6 divisors (see below), whose sum is σ = 2584290. Its totient is φ = 2395568.

The previous prime is 2489611. The next prime is 2489639. The reversal of 2489621 is 1269842.

It can be written as a sum of positive squares in 3 ways, for example, as 1661521 + 828100 = 1289^2 + 910^2 .

It is not a de Polignac number, because 2489621 - 2¹⁰ = 2488597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8351 + ... + 8643.

It is an arithmetic number, because the mean of its divisors is an integer number (430715).

2^2489621 is an apocalyptic number.

It is an amenable number.

2489621 is a deficient number, since it is larger than the sum of its proper divisors (94669).

2489621 is an frugal number, since it uses more digits than its factorization.

2489621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 322 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 2489621 is about 1577.8532884904. The cubic root of 2489621 is about 135.5328007084.

The spelling of 2489621 in words is "two million, four hundred eighty-nine thousand, six hundred twenty-one".