2787122 has 8 divisors (see below), whose sum is σ = 4502316. Its totient is φ = 1286352.

The previous prime is 2787121. The next prime is 2787143. The reversal of 2787122 is 2217872.

It can be written as a sum of positive squares in 2 ways, for example, as 1957201 + 829921 = 1399^2 + 911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2787121) 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, 53573 + ... + 53624.

2^2787122 is an apocalyptic number.

2787122 is a deficient number, since it is larger than the sum of its proper divisors (1715194).

2787122 is a wasteful number, since it uses less digits than its factorization.

2787122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107212.

The product of its digits is 3136, while the sum is 29.

The square root of 2787122 is about 1669.4675797990. The cubic root of 2787122 is about 140.7295589129.

The spelling of 2787122 in words is "two million, seven hundred eighty-seven thousand, one hundred twenty-two".