1260201521 has 2 divisors, whose sum is σ = 1260201522. Its totient is φ = 1260201520.

The previous prime is 1260201499. The next prime is 1260201577. The reversal of 1260201521 is 1251020621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1229554225 + 30647296 = 35065^2 + 5536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260201521 - 2⁶ = 1260201457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1260201493 and 1260201502.

It is not a weakly prime, because it can be changed into another prime (1260201121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630100760 + 630100761.

It is an arithmetic number, because the mean of its divisors is an integer number (630100761).

Almost surely, 2^1260201521 is an apocalyptic number.

It is an amenable number.

1260201521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260201521 is an equidigital number, since it uses as much as digits as its factorization.

1260201521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1260201521 is about 35499.3171906165. The cubic root of 1260201521 is about 1080.1398770018.

Subtracting from 1260201521 its reverse (1251020621), we obtain a square (9180900 = 3030²).

The spelling of 1260201521 in words is "one billion, two hundred sixty million, two hundred one thousand, five hundred twenty-one".