2661489 has 12 divisors (see below), whose sum is σ = 3879876. Its totient is φ = 1757952.

The previous prime is 2661487. The next prime is 2661493. The reversal of 2661489 is 9841662.

It can be written as a sum of positive squares in 2 ways, for example, as 1299600 + 1361889 = 1140^2 + 1167^2 .

It is not a de Polignac number, because 2661489 - 2¹ = 2661487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 292 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (323323).

2^2661489 is an apocalyptic number.

It is an amenable number.

2661489 is a deficient number, since it is larger than the sum of its proper divisors (1218387).

2661489 is a wasteful number, since it uses less digits than its factorization.

2661489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736 (or 2733 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2661489 is about 1631.4070614044. The cubic root of 2661489 is about 138.5824468816.

The spelling of 2661489 in words is "two million, six hundred sixty-one thousand, four hundred eighty-nine".