1200920 has 32 divisors (see below), whose sum is σ = 3088800. Its totient is φ = 411648.

The previous prime is 1200917. The next prime is 1200929. The reversal of 1200920 is 290021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1200895 and 1200904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200929) 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, 1865 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (96525).

2^1200920 is an apocalyptic number.

1200920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200920 is an abundant number, since it is smaller than the sum of its proper divisors (1887880).

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

1200920 is a wasteful number, since it uses less digits than its factorization.

1200920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307 (or 4303 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1200920 is about 1095.8649551838. The cubic root of 1200920 is about 106.2930068112.

Adding to 1200920 its reverse (290021), we get a palindrome (1490941).

The spelling of 1200920 in words is "one million, two hundred thousand, nine hundred twenty".