2891045 has 4 divisors (see below), whose sum is σ = 3469260. Its totient is φ = 2312832.

The previous prime is 2891041. The next prime is 2891051. The reversal of 2891045 is 5401982.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 1674436 = 1103^2 + 1294^2 .

It is a cyclic number.

It is not a de Polignac number, because 2891045 - 2² = 2891041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2890999 and 2891017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289100 + ... + 289109.

It is an arithmetic number, because the mean of its divisors is an integer number (867315).

2^2891045 is an apocalyptic number.

It is an amenable number.

2891045 is a deficient number, since it is larger than the sum of its proper divisors (578215).

2891045 is an equidigital number, since it uses as much as digits as its factorization.

2891045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578214.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2891045 is about 1700.3073251621. The cubic root of 2891045 is about 142.4573792718.

The spelling of 2891045 in words is "two million, eight hundred ninety-one thousand, forty-five".