1057532261 has 4 divisors (see below), whose sum is σ = 1086114252. Its totient is φ = 1028950272.

The previous prime is 1057532257. The next prime is 1057532263. The reversal of 1057532261 is 1622357501.

1057532261 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 an emirpimes, since its reverse is a distinct semiprime: 1622357501 = 36739 ⋅44159.

It can be written as a sum of positive squares in 2 ways, for example, as 595067236 + 462465025 = 24394^2 + 21505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1057532261 - 2² = 1057532257 is a prime.

It is a super-2 number, since 2×1057532261² = 2236748966111544242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057532263) 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, 14290940 + ... + 14291013.

It is an arithmetic number, because the mean of its divisors is an integer number (271528563).

Almost surely, 2^1057532261 is an apocalyptic number.

It is an amenable number.

1057532261 is a deficient number, since it is larger than the sum of its proper divisors (28581991).

1057532261 is an equidigital number, since it uses as much as digits as its factorization.

1057532261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28581990.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1057532261 is about 32519.7211088902. The cubic root of 1057532261 is about 1018.8209691436.

Adding to 1057532261 its reverse (1622357501), we get a palindrome (2679889762).

The spelling of 1057532261 in words is "one billion, fifty-seven million, five hundred thirty-two thousand, two hundred sixty-one".