1200390 has 16 divisors (see below), whose sum is σ = 2881008. Its totient is φ = 320096.

The previous prime is 1200389. The next prime is 1200403. The reversal of 1200390 is 930021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19977 + ... + 20036.

It is an arithmetic number, because the mean of its divisors is an integer number (180063).

2^1200390 is an apocalyptic number.

1200390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200390 is an abundant number, since it is smaller than the sum of its proper divisors (1680618).

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

1200390 is a wasteful number, since it uses less digits than its factorization.

1200390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40023.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1200390 is about 1095.6231103806. The cubic root of 1200390 is about 106.2773678058.

The spelling of 1200390 in words is "one million, two hundred thousand, three hundred ninety".