1202651521 has 2 divisors, whose sum is σ = 1202651522. Its totient is φ = 1202651520.

The previous prime is 1202651509. The next prime is 1202651533. The reversal of 1202651521 is 1251562021.

It is a balanced prime because it is at equal distance from previous prime (1202651509) and next prime (1202651533).

It can be written as a sum of positive squares in only one way, i.e., 1179235600 + 23415921 = 34340^2 + 4839^2 .

It is an emirp because it is prime and its reverse (1251562021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1202651521 - 2¹¹ = 1202649473 is a prime.

It is a super-2 number, since 2×1202651521² = 2892741361927226882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1202651501) 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, 601325760 + 601325761.

It is an arithmetic number, because the mean of its divisors is an integer number (601325761).

Almost surely, 2^1202651521 is an apocalyptic number.

It is an amenable number.

1202651521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202651521 is an equidigital number, since it uses as much as digits as its factorization.

1202651521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1202651521 is about 34679.2664426455. The cubic root of 1202651521 is about 1063.4406771697.

The spelling of 1202651521 in words is "one billion, two hundred two million, six hundred fifty-one thousand, five hundred twenty-one".