1124521261 has 2 divisors, whose sum is σ = 1124521262. Its totient is φ = 1124521260.

The previous prime is 1124521247. The next prime is 1124521357. The reversal of 1124521261 is 1621254211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121848036 + 2673225 = 33494^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1124521261 - 2¹³ = 1124513069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1124521231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562260630 + 562260631.

It is an arithmetic number, because the mean of its divisors is an integer number (562260631).

Almost surely, 2^1124521261 is an apocalyptic number.

It is an amenable number.

1124521261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1124521261 is an equidigital number, since it uses as much as digits as its factorization.

1124521261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 1124521261 is about 33533.8822834458. The cubic root of 1124521261 is about 1039.8943621129.

Adding to 1124521261 its reverse (1621254211), we get a palindrome (2745775472).

The spelling of 1124521261 in words is "one billion, one hundred twenty-four million, five hundred twenty-one thousand, two hundred sixty-one".