1071220 has 24 divisors (see below), whose sum is σ = 2368800. Its totient is φ = 405792.

The previous prime is 1071197. The next prime is 1071223. The reversal of 1071220 is 221701.

It is a super-2 number, since 2×1071220² = 2295024576800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1071220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071223) 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, 1030 + ... + 1789.

It is an arithmetic number, because the mean of its divisors is an integer number (98700).

2^1071220 is an apocalyptic number.

1071220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1071220 is an abundant number, since it is smaller than the sum of its proper divisors (1297580).

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

1071220 is a wasteful number, since it uses less digits than its factorization.

1071220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847 (or 2845 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 1071220 is about 1034.9975845382. The cubic root of 1071220 is about 102.3197705314.

Adding to 1071220 its reverse (221701), we get a palindrome (1292921).

The spelling of 1071220 in words is "one million, seventy-one thousand, two hundred twenty".