7050781 has 2 divisors, whose sum is σ = 7050782. Its totient is φ = 7050780.

The previous prime is 7050761. The next prime is 7050787. The reversal of 7050781 is 1870507.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 54756 = 2645^2 + 234^2 .

It is an emirp because it is prime and its reverse (1870507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7050781 - 2¹³ = 7042589 is a prime.

It is a super-2 number, since 2×7050781² = 99427025419922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

7050781 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7050787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3525390 + 3525391.

It is an arithmetic number, because the mean of its divisors is an integer number (3525391).

Almost surely, 2^7050781 is an apocalyptic number.

7050781 is the 1188-th centered decagonal number.

It is an amenable number.

7050781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7050781 is an equidigital number, since it uses as much as digits as its factorization.

7050781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 7050781 is about 2655.3306762059. The cubic root of 7050781 is about 191.7545782810.

The spelling of 7050781 in words is "seven million, fifty thousand, seven hundred eighty-one".