1025245 has 8 divisors (see below), whose sum is σ = 1325016. Its totient is φ = 757056.

The previous prime is 1025239. The next prime is 1025257. The reversal of 1025245 is 5425201.

It can be written as a sum of positive squares in 4 ways, for example, as 29241 + 996004 = 171^2 + 998^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1025245 - 2¹⁹ = 500957 is a prime.

It is a super-2 number, since 2×1025245² = 2102254620050, which contains 22 as substring.

It is a Duffinian number.

1025245 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7822 + ... + 7951.

It is an arithmetic number, because the mean of its divisors is an integer number (165627).

2^1025245 is an apocalyptic number.

It is an amenable number.

1025245 is a deficient number, since it is larger than the sum of its proper divisors (299771).

1025245 is a wasteful number, since it uses less digits than its factorization.

1025245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15791.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1025245 is about 1012.5438262120. The cubic root of 1025245 is about 100.8345164505.

The spelling of 1025245 in words is "one million, twenty-five thousand, two hundred forty-five".