1211401 has 4 divisors (see below), whose sum is σ = 1214100. Its totient is φ = 1208704.

The previous prime is 1211393. The next prime is 1211407. The reversal of 1211401 is 1041121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 251001 + 960400 = 501^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211401 - 2³ = 1211393 is a prime.

It is a super-3 number, since 3×1211401³ = 5333165220052542603, which contains 333 as substring.

It is a Duffinian number.

1211401 is a lucky number.

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 3 ways as a sum of consecutive naturals, for example, 496 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (303525).

2^1211401 is an apocalyptic number.

It is an amenable number.

1211401 is a deficient number, since it is larger than the sum of its proper divisors (2699).

1211401 is an equidigital number, since it uses as much as digits as its factorization.

1211401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1211401 is about 1100.6366339533. The cubic root of 1211401 is about 106.6013347763.

Adding to 1211401 its reverse (1041121), we get a palindrome (2252522).

The spelling of 1211401 in words is "one million, two hundred eleven thousand, four hundred one".