1202025521 has 2 divisors, whose sum is σ = 1202025522. Its totient is φ = 1202025520.

The previous prime is 1202025499. The next prime is 1202025523. The reversal of 1202025521 is 1255202021.

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., 1060153600 + 141871921 = 32560^2 + 11911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202025521 is a prime.

Together with 1202025523, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202025493 and 1202025502.

It is not a weakly prime, because it can be changed into another prime (1202025523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601012760 + 601012761.

It is an arithmetic number, because the mean of its divisors is an integer number (601012761).

Almost surely, 2^1202025521 is an apocalyptic number.

It is an amenable number.

1202025521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202025521 is an equidigital number, since it uses as much as digits as its factorization.

1202025521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1202025521 is about 34670.2397020846. The cubic root of 1202025521 is about 1063.2561323283.

Adding to 1202025521 its reverse (1255202021), we get a palindrome (2457227542).

The spelling of 1202025521 in words is "one billion, two hundred two million, twenty-five thousand, five hundred twenty-one".