1141561369 has 27 divisors (see below), whose sum is σ = 1303746717. Its totient is φ = 999014016.

The previous prime is 1141561367. The next prime is 1141561403. The reversal of 1141561369 is 9631651411.

The square root of 1141561369 is 33787.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 851880969 + 289680400 = 29187^2 + 17020^2 .

It is not a de Polignac number, because 1141561369 - 2¹ = 1141561367 is a prime.

It is a super-2 number, since 2×1141561369² = 2606324718386308322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1141561367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10102257 + ... + 10102369.

Almost surely, 2^1141561369 is an apocalyptic number.

1141561369 is the 33787-th square number.

1141561369 is the 16894-th centered octagonal number.

It is an amenable number.

1141561369 is a deficient number, since it is larger than the sum of its proper divisors (162185348).

1141561369 is an equidigital number, since it uses as much as digits as its factorization.

1141561369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 149 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The cubic root of 1141561369 is about 1045.1206316637.

The spelling of 1141561369 in words is "one billion, one hundred forty-one million, five hundred sixty-one thousand, three hundred sixty-nine".