1061263361 has 4 divisors (see below), whose sum is σ = 1081287252. Its totient is φ = 1041239472.

The previous prime is 1061263339. The next prime is 1061263409. The reversal of 1061263361 is 1633621601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 387341761 + 673921600 = 19681^2 + 25960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061263361 - 2¹⁸ = 1061001217 is a prime.

It is a super-2 number, since 2×1061263361² = 2252559842802032642, 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 (1061263261) 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, 10011866 + ... + 10011971.

It is an arithmetic number, because the mean of its divisors is an integer number (270321813).

Almost surely, 2^1061263361 is an apocalyptic number.

It is an amenable number.

1061263361 is a deficient number, since it is larger than the sum of its proper divisors (20023891).

1061263361 is an equidigital number, since it uses as much as digits as its factorization.

1061263361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20023890.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1061263361 is about 32577.0373269271. The cubic root of 1061263361 is about 1020.0177367799.

Adding to 1061263361 its reverse (1633621601), we get a palindrome (2694884962).

The spelling of 1061263361 in words is "one billion, sixty-one million, two hundred sixty-three thousand, three hundred sixty-one".