1211020 has 24 divisors (see below), whose sum is σ = 2566368. Its totient is φ = 480000.

The previous prime is 1210999. The next prime is 1211027. The reversal of 1211020 is 201121.

It is a junction number, because it is equal to n+sod(n) for n = 1210994 and 1211012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211027) 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, 2820 + ... + 3220.

It is an arithmetic number, because the mean of its divisors is an integer number (106932).

2^1211020 is an apocalyptic number.

1211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211020 is an abundant number, since it is smaller than the sum of its proper divisors (1355348).

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

1211020 is a wasteful number, since it uses less digits than its factorization.

1211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1211020 is about 1100.4635386963. The cubic root of 1211020 is about 106.5901578092.

Adding to 1211020 its reverse (201121), we get a palindrome (1412141).

The spelling of 1211020 in words is "one million, two hundred eleven thousand, twenty".