1156212 has 18 divisors (see below), whose sum is σ = 2922738. Its totient is φ = 385392.

The previous prime is 1156171. The next prime is 1156217. The reversal of 1156212 is 2126511.

It can be written as a sum of positive squares in only one way, i.e., 646416 + 509796 = 804^2 + 714^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16023 + ... + 16094.

2^1156212 is an apocalyptic number.

1156212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1156212 is an abundant number, since it is smaller than the sum of its proper divisors (1766526).

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

1156212 is a wasteful number, since it uses less digits than its factorization.

1156212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32127 (or 32122 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1156212 is about 1075.2729885941. The cubic root of 1156212 is about 104.9572615179.

Subtracting 1156212 from its reverse (2126511), we obtain a cube (970299 = 99³).

The spelling of 1156212 in words is "one million, one hundred fifty-six thousand, two hundred twelve".