1216471 has 4 divisors (see below), whose sum is σ = 1255744. Its totient is φ = 1177200.

The previous prime is 1216459. The next prime is 1216489. The reversal of 1216471 is 1746121.

1216471 = T₁₁₃ + T₁₁₄ + ... + T₂₀₅.

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

It is a cyclic number.

It is not a de Polignac number, because 1216471 - 2¹³ = 1208279 is a prime.

It is a super-3 number, since 3×1216471³ = 5400407538925365333, which contains 333 as substring.

It is a Duffinian number.

1216471 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19590 + ... + 19651.

It is an arithmetic number, because the mean of its divisors is an integer number (313936).

2^1216471 is an apocalyptic number.

1216471 is a deficient number, since it is larger than the sum of its proper divisors (39273).

1216471 is an equidigital number, since it uses as much as digits as its factorization.

1216471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39272.

The product of its digits is 336, while the sum is 22.

The square root of 1216471 is about 1102.9374415623. The cubic root of 1216471 is about 106.7498450601.

The spelling of 1216471 in words is "one million, two hundred sixteen thousand, four hundred seventy-one".