1061161345 has 4 divisors (see below), whose sum is σ = 1273393620. Its totient is φ = 848929072.

The previous prime is 1061161337. The next prime is 1061161349. The reversal of 1061161345 is 5431611601.

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 474019984 + 587141361 = 21772^2 + 24231^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061161345 - 2³ = 1061161337 is a prime.

It is a super-2 number, since 2×1061161345² = 2252126800244418050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061161349) 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 3 ways as a sum of consecutive naturals, for example, 106116130 + ... + 106116139.

It is an arithmetic number, because the mean of its divisors is an integer number (318348405).

Almost surely, 2^1061161345 is an apocalyptic number.

It is an amenable number.

1061161345 is a deficient number, since it is larger than the sum of its proper divisors (212232275).

1061161345 is an equidigital number, since it uses as much as digits as its factorization.

1061161345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212232274.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1061161345 is about 32575.4715238322. The cubic root of 1061161345 is about 1019.9850520044.

Adding to 1061161345 its reverse (5431611601), we get a palindrome (6492772946).

The spelling of 1061161345 in words is "one billion, sixty-one million, one hundred sixty-one thousand, three hundred forty-five".