1211364 has 144 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 285120.

The previous prime is 1211339. The next prime is 1211381. The reversal of 1211364 is 4631121.

It is a happy number.

1211364 is nontrivially palindromic in base 8.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52657 + ... + 52679.

It is an arithmetic number, because the mean of its divisors is an integer number (29120).

2^1211364 is an apocalyptic number.

1211364 is a gapful number since it is divisible by the number (14) 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 1211364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096640).

1211364 is an abundant number, since it is smaller than the sum of its proper divisors (2981916).

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

1211364 is a wasteful number, since it uses less digits than its factorization.

1211364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 65 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1211364 is about 1100.6198253711. The cubic root of 1211364 is about 106.6002494518.

Subtracting from 1211364 its sum of digits (18), we obtain a triangular number (1211346 = T₁₅₅₆).

Adding to 1211364 its reverse (4631121), we get a palindrome (5842485).

It can be divided in two parts, 121 and 1364, that added together give a triangular number (1485 = T₅₄).

The spelling of 1211364 in words is "one million, two hundred eleven thousand, three hundred sixty-four".