1220471 has 8 divisors (see below), whose sum is σ = 1413120. Its totient is φ = 1032408.

The previous prime is 1220437. The next prime is 1220489. The reversal of 1220471 is 1740221.

1220471 = 231² + 232² + ... + 251².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220471 - 2¹⁸ = 958327 is a prime.

It is a super-3 number, since 3×1220471³ = 5453855763727641333, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220411) 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, 551 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (176640).

2^1220471 is an apocalyptic number.

1220471 is a deficient number, since it is larger than the sum of its proper divisors (192649).

1220471 is an equidigital number, since it uses as much as digits as its factorization.

1220471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1220471 is about 1104.7492928262. The cubic root of 1220471 is about 106.8667219971.

Adding to 1220471 its reverse (1740221), we get a palindrome (2960692).

The spelling of 1220471 in words is "one million, two hundred twenty thousand, four hundred seventy-one".