1161213045 has 8 divisors (see below), whose sum is σ = 1857940896. Its totient is φ = 619313616.

The previous prime is 1161213017. The next prime is 1161213047. The reversal of 1161213045 is 5403121611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161213045 - 2¹³ = 1161204853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161213047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38707087 + ... + 38707116.

It is an arithmetic number, because the mean of its divisors is an integer number (232242612).

Almost surely, 2^1161213045 is an apocalyptic number.

1161213045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161213045 is a deficient number, since it is larger than the sum of its proper divisors (696727851).

1161213045 is an equidigital number, since it uses as much as digits as its factorization.

1161213045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77414211.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1161213045 is about 34076.5761924522. The cubic root of 1161213045 is about 1051.0837019912.

Adding to 1161213045 its reverse (5403121611), we get a palindrome (6564334656).

The spelling of 1161213045 in words is "one billion, one hundred sixty-one million, two hundred thirteen thousand, forty-five".