1156211712 has 352 divisors, whose sum is σ = 3773030400. Its totient is φ = 348364800.

The previous prime is 1156211711. The next prime is 1156211717. The reversal of 1156211712 is 2171126511.

1156211712 is a `hidden beast` number, since 1 + 15 + 621 + 17 + 12 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1156211711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16284637 + ... + 16284707.

Almost surely, 2^1156211712 is an apocalyptic number.

1156211712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156211712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1886515200).

1156211712 is an abundant number, since it is smaller than the sum of its proper divisors (2616818688).

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

1156211712 is a wasteful number, since it uses less digits than its factorization.

1156211712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 126 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 1156211712 is about 34003.1132692287. The cubic root of 1156211712 is about 1049.5725280337.

The spelling of 1156211712 in words is "one billion, one hundred fifty-six million, two hundred eleven thousand, seven hundred twelve".