1203145 has 8 divisors (see below), whose sum is σ = 1479240. Its totient is φ = 938880.

The previous prime is 1203127. The next prime is 1203149. The reversal of 1203145 is 5413021.

It can be written as a sum of positive squares in 4 ways, for example, as 45369 + 1157776 = 213^2 + 1076^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1203145 - 2⁹ = 1202633 is a prime.

1203145 is a lucky number.

It is a plaindrome in base 9 and base 14.

It is not an unprimeable number, because it can be changed into a prime (1203149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2730 + ... + 3139.

It is an arithmetic number, because the mean of its divisors is an integer number (184905).

2^1203145 is an apocalyptic number.

It is an amenable number.

1203145 is a deficient number, since it is larger than the sum of its proper divisors (276095).

1203145 is an equidigital number, since it uses as much as digits as its factorization.

1203145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1203145 is about 1096.8796652322. The cubic root of 1203145 is about 106.3586109678.

Adding to 1203145 its reverse (5413021), we get a palindrome (6616166).

The spelling of 1203145 in words is "one million, two hundred three thousand, one hundred forty-five".