1207145 has 4 divisors (see below), whose sum is σ = 1448580. Its totient is φ = 965712.

The previous prime is 1207133. The next prime is 1207147. The reversal of 1207145 is 5417021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 355216 + 851929 = 596^2 + 923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1207145 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1207147) 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 3 ways as a sum of consecutive naturals, for example, 120710 + ... + 120719.

It is an arithmetic number, because the mean of its divisors is an integer number (362145).

2^1207145 is an apocalyptic number.

It is an amenable number.

1207145 is a deficient number, since it is larger than the sum of its proper divisors (241435).

1207145 is an equidigital number, since it uses as much as digits as its factorization.

1207145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241434.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1207145 is about 1098.7015063246. The cubic root of 1207145 is about 106.4763479109.

The spelling of 1207145 in words is "one million, two hundred seven thousand, one hundred forty-five".