2661128 has 8 divisors (see below), whose sum is σ = 4989630. Its totient is φ = 1330560.

The previous prime is 2661119. The next prime is 2661137. The reversal of 2661128 is 8211662.

It is an interprime number because it is at equal distance from previous prime (2661119) and next prime (2661137).

It can be written as a sum of positive squares in only one way, i.e., 2502724 + 158404 = 1582^2 + 398^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2661097 and 2661106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166313 + ... + 166328.

2^2661128 is an apocalyptic number.

It is an amenable number.

2661128 is a deficient number, since it is larger than the sum of its proper divisors (2328502).

2661128 is a wasteful number, since it uses less digits than its factorization.

2661128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332647 (or 332643 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 2661128 is about 1631.2964169641. The cubic root of 2661128 is about 138.5761808997.

The spelling of 2661128 in words is "two million, six hundred sixty-one thousand, one hundred twenty-eight".