2631247 has 2 divisors, whose sum is σ = 2631248. Its totient is φ = 2631246.

The previous prime is 2631241. The next prime is 2631259. The reversal of 2631247 is 7421362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2631247 - 2¹⁹ = 2106959 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹¹ + 6 + 3¹² + 1 + 2²¹ + 4⁴ + 7³ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2631241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315623 + 1315624.

It is an arithmetic number, because the mean of its divisors is an integer number (1315624).

2^2631247 is an apocalyptic number.

2631247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2631247 is an equidigital number, since it uses as much as digits as its factorization.

2631247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 2631247 is about 1622.1118950307. Note that the first 3 decimals coincide. The cubic root of 2631247 is about 138.0555506944.

The spelling of 2631247 in words is "two million, six hundred thirty-one thousand, two hundred forty-seven".