2489642 has 4 divisors (see below), whose sum is σ = 3734466. Its totient is φ = 1244820.

The previous prime is 2489639. The next prime is 2489647. The reversal of 2489642 is 2469842.

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

It can be written as a sum of positive squares in only one way, i.e., 1713481 + 776161 = 1309^2 + 881^2 .

It is not an unprimeable number, because it can be changed into a prime (2489647) 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 as a sum of consecutive naturals, namely, 622409 + ... + 622412.

2^2489642 is an apocalyptic number.

2489642 is a deficient number, since it is larger than the sum of its proper divisors (1244824).

2489642 is a wasteful number, since it uses less digits than its factorization.

2489642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244823.

The product of its digits is 27648, while the sum is 35.

The square root of 2489642 is about 1577.8599430875. The cubic root of 2489642 is about 135.5331817812.

The spelling of 2489642 in words is "two million, four hundred eighty-nine thousand, six hundred forty-two".