1156645212 has 12 divisors (see below), whose sum is σ = 2698838856. Its totient is φ = 385548400.

The previous prime is 1156645207. The next prime is 1156645213. The reversal of 1156645212 is 2125466511.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156645213) 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, 48193539 + ... + 48193562.

It is an arithmetic number, because the mean of its divisors is an integer number (224903238).

Almost surely, 2^1156645212 is an apocalyptic number.

1156645212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1156645212 is an abundant number, since it is smaller than the sum of its proper divisors (1542193644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156645212 is a wasteful number, since it uses less digits than its factorization.

1156645212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96387108 (or 96387106 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 1156645212 is about 34009.4870881641. The cubic root of 1156645212 is about 1049.7036841864.

The spelling of 1156645212 in words is "one billion, one hundred fifty-six million, six hundred forty-five thousand, two hundred twelve".