1156213245 has 16 divisors (see below), whose sum is σ = 2018117952. Its totient is φ = 560588160.

The previous prime is 1156213241. The next prime is 1156213271. The reversal of 1156213245 is 5423126511.

It is not a de Polignac number, because 1156213245 - 2² = 1156213241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156213241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3503512 + ... + 3503841.

It is an arithmetic number, because the mean of its divisors is an integer number (126132372).

Almost surely, 2^1156213245 is an apocalyptic number.

1156213245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1156213245 is a deficient number, since it is larger than the sum of its proper divisors (861904707).

1156213245 is a wasteful number, since it uses less digits than its factorization.

1156213245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007372.

The product of its digits is 7200, while the sum is 30.

The square root of 1156213245 is about 34003.1358112748. The cubic root of 1156213245 is about 1049.5729919032.

Adding to 1156213245 its reverse (5423126511), we get a palindrome (6579339756).

The spelling of 1156213245 in words is "one billion, one hundred fifty-six million, two hundred thirteen thousand, two hundred forty-five".