2745658 has 4 divisors (see below), whose sum is σ = 4118490. Its totient is φ = 1372828.

The previous prime is 2745643. The next prime is 2745661. The reversal of 2745658 is 8565472.

It is a happy number.

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., 2745649 + 9 = 1657^2 + 3^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686413 + ... + 686416.

2^2745658 is an apocalyptic number.

2745658 is a deficient number, since it is larger than the sum of its proper divisors (1372832).

2745658 is a wasteful number, since it uses less digits than its factorization.

2745658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372831.

The product of its digits is 67200, while the sum is 37.

The square root of 2745658 is about 1657.0027157491. The cubic root of 2745658 is about 140.0281916016.

It can be divided in two parts, 2745 and 658, that added together give a triangular number (3403 = T₈₂).

The spelling of 2745658 in words is "two million, seven hundred forty-five thousand, six hundred fifty-eight".