1211406 has 16 divisors (see below), whose sum is σ = 2769024. Its totient is φ = 346104.

The previous prime is 1211393. The next prime is 1211407. The reversal of 1211406 is 6041121.

It is a super-3 number, since 3×1211406³ = 5333231257482334248, which contains 333 as substring.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14380 + ... + 14463.

It is an arithmetic number, because the mean of its divisors is an integer number (173064).

2^1211406 is an apocalyptic number.

1211406 is an abundant number, since it is smaller than the sum of its proper divisors (1557618).

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

1211406 is a wasteful number, since it uses less digits than its factorization.

1211406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28855.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1211406 is about 1100.6389053636. The cubic root of 1211406 is about 106.6014814400.

Adding to 1211406 its reverse (6041121), we get a palindrome (7252527).

The spelling of 1211406 in words is "one million, two hundred eleven thousand, four hundred six".