1245005 has 6 divisors (see below), whose sum is σ = 1497006. Its totient is φ = 994008.

The previous prime is 1245001. The next prime is 1245017. The reversal of 1245005 is 5005421.

It can be written as a sum of positive squares in only one way, i.e., 996004 + 249001 = 998^2 + 499^2 .

It is not a de Polignac number, because 1245005 - 2² = 1245001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2246 + ... + 2744.

It is an arithmetic number, because the mean of its divisors is an integer number (249501).

2^1245005 is an apocalyptic number.

It is an amenable number.

1245005 is a deficient number, since it is larger than the sum of its proper divisors (252001).

1245005 is an frugal number, since it uses more digits than its factorization.

1245005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1245005 is about 1115.7979207724. The cubic root of 1245005 is about 107.5780576033.

The spelling of 1245005 in words is "one million, two hundred forty-five thousand, five".