1061358521 has 4 divisors (see below), whose sum is σ = 1061423844. Its totient is φ = 1061293200.

The previous prime is 1061358511. The next prime is 1061358523. The reversal of 1061358521 is 1258531601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 371718400 + 689640121 = 19280^2 + 26261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061358521 is a prime.

It is a super-2 number, since 2×1061358521² = 2252963820198614882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1061358523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12851 + ... + 47831.

It is an arithmetic number, because the mean of its divisors is an integer number (265355961).

Almost surely, 2^1061358521 is an apocalyptic number.

It is an amenable number.

1061358521 is a deficient number, since it is larger than the sum of its proper divisors (65323).

1061358521 is an equidigital number, since it uses as much as digits as its factorization.

1061358521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65322.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1061358521 is about 32578.4978321592. The cubic root of 1061358521 is about 1020.0482230821.

The spelling of 1061358521 in words is "one billion, sixty-one million, three hundred fifty-eight thousand, five hundred twenty-one".