2775021 has 8 divisors (see below), whose sum is σ = 3778944. Its totient is φ = 1810560.

The previous prime is 2775011. The next prime is 2775041. The reversal of 2775021 is 1205772.

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

It is not a de Polignac number, because 2775021 - 2⁶ = 2774957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2774982 and 2775000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9700 + ... + 9981.

It is an arithmetic number, because the mean of its divisors is an integer number (472368).

2^2775021 is an apocalyptic number.

It is an amenable number.

2775021 is a deficient number, since it is larger than the sum of its proper divisors (1003923).

2775021 is a wasteful number, since it uses less digits than its factorization.

2775021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19731.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 2775021 is about 1665.8394280362. The cubic root of 2775021 is about 140.5255923627.

The spelling of 2775021 in words is "two million, seven hundred seventy-five thousand, twenty-one".