1211671 has 4 divisors (see below), whose sum is σ = 1214752. Its totient is φ = 1208592.

The previous prime is 1211669. The next prime is 1211677. The reversal of 1211671 is 1761121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1761121 = 631 ⋅2791.

It is a cyclic number.

It is not a de Polignac number, because 1211671 - 2¹ = 1211669 is a prime.

It is a super-2 number, since 2×1211671² = 2936293224482, which contains 22 as substring.

It is a Duffinian number.

1211671 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211677) 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, 846 + ... + 1771.

It is an arithmetic number, because the mean of its divisors is an integer number (303688).

2^1211671 is an apocalyptic number.

1211671 is a deficient number, since it is larger than the sum of its proper divisors (3081).

1211671 is an equidigital number, since it uses as much as digits as its factorization.

1211671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080.

The product of its digits is 84, while the sum is 19.

The square root of 1211671 is about 1100.7592834040. The cubic root of 1211671 is about 106.6092540428.

Adding to 1211671 its reverse (1761121), we get a palindrome (2972792).

The spelling of 1211671 in words is "one million, two hundred eleven thousand, six hundred seventy-one".