7124561 has 2 divisors, whose sum is σ = 7124562. Its totient is φ = 7124560.

The previous prime is 7124543. The next prime is 7124569. The reversal of 7124561 is 1654217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7054336 + 70225 = 2656^2 + 265^2 .

It is an emirp because it is prime and its reverse (1654217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7124561 - 2¹⁴ = 7108177 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7124561.

It is not a weakly prime, because it can be changed into another prime (7124569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3562280 + 3562281.

It is an arithmetic number, because the mean of its divisors is an integer number (3562281).

Almost surely, 2^7124561 is an apocalyptic number.

It is an amenable number.

7124561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7124561 is an equidigital number, since it uses as much as digits as its factorization.

7124561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 7124561 is about 2669.1873295069. The cubic root of 7124561 is about 192.4211044546.

Adding to 7124561 its reverse (1654217), we get a palindrome (8778778).

The spelling of 7124561 in words is "seven million, one hundred twenty-four thousand, five hundred sixty-one".