1061521057 has 4 divisors (see below), whose sum is σ = 1062601920. Its totient is φ = 1060440196.

The previous prime is 1061521049. The next prime is 1061521063. The reversal of 1061521057 is 7501251601.

1061521057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1061521057 - 2³ = 1061521049 is a prime.

It is a super-2 number, since 2×1061521057² = 2253653908908794498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061521007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538957 + ... + 540922.

It is an arithmetic number, because the mean of its divisors is an integer number (265650480).

Almost surely, 2^1061521057 is an apocalyptic number.

It is an amenable number.

1061521057 is a deficient number, since it is larger than the sum of its proper divisors (1080863).

1061521057 is an equidigital number, since it uses as much as digits as its factorization.

1061521057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080862.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 1061521057 is about 32580.9922654299. The cubic root of 1061521057 is about 1020.1002903438.

Adding to 1061521057 its reverse (7501251601), we get a palindrome (8562772658).

The spelling of 1061521057 in words is "one billion, sixty-one million, five hundred twenty-one thousand, fifty-seven".