2775247 has 2 divisors, whose sum is σ = 2775248. Its totient is φ = 2775246.

The previous prime is 2775221. The next prime is 2775257. The reversal of 2775247 is 7425772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2775247 - 2⁷ = 2775119 is a prime.

It is a super-2 number, since 2×2775247² = 15403991822018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2775257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387623 + 1387624.

It is an arithmetic number, because the mean of its divisors is an integer number (1387624).

2^2775247 is an apocalyptic number.

2775247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2775247 is an equidigital number, since it uses as much as digits as its factorization.

2775247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 34.

The square root of 2775247 is about 1665.9072603239. The cubic root of 2775247 is about 140.5294070992.

The spelling of 2775247 in words is "two million, seven hundred seventy-five thousand, two hundred forty-seven".