1200345 has 16 divisors (see below), whose sum is σ = 1966272. Its totient is φ = 624960.

The previous prime is 1200341. The next prime is 1200349. The reversal of 1200345 is 5430021.

It is an interprime number because it is at equal distance from previous prime (1200341) and next prime (1200349).

It is not a de Polignac number, because 1200345 - 2² = 1200341 is a prime.

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

1200345 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1200341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (122892).

2^1200345 is an apocalyptic number.

1200345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1200345 is a deficient number, since it is larger than the sum of its proper divisors (765927).

1200345 is a wasteful number, since it uses less digits than its factorization.

1200345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1200345 is about 1095.6025739291. The cubic root of 1200345 is about 106.2760397538.

Adding to 1200345 its reverse (5430021), we get a palindrome (6630366).

The spelling of 1200345 in words is "one million, two hundred thousand, three hundred forty-five".