1200040 has 32 divisors (see below), whose sum is σ = 2844000. Its totient is φ = 454464.

The previous prime is 1200007. The next prime is 1200061. The reversal of 1200040 is 400021.

It is a junction number, because it is equal to n+sod(n) for n = 1199996 and 1200032.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30 + ... + 1549.

It is an arithmetic number, because the mean of its divisors is an integer number (88875).

2^1200040 is an apocalyptic number.

1200040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422000).

1200040 is an abundant number, since it is smaller than the sum of its proper divisors (1643960).

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

1200040 is a wasteful number, since it uses less digits than its factorization.

1200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609 (or 1605 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1200040 is about 1095.4633722768. The cubic root of 1200040 is about 106.2670376369.

Adding to 1200040 its reverse (400021), we get a palindrome (1600061).

The spelling of 1200040 in words is "one million, two hundred thousand, forty".