1243525 has 6 divisors (see below), whose sum is σ = 1542002. Its totient is φ = 994800.

The previous prime is 1243523. The next prime is 1243537. The reversal of 1243525 is 5253421.

It can be written as a sum of positive squares in 3 ways, for example, as 294849 + 948676 = 543^2 + 974^2 .

It is not a de Polignac number, because 1243525 - 2¹ = 1243523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243496 and 1243505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243523) 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 5 ways as a sum of consecutive naturals, for example, 24846 + ... + 24895.

2^1243525 is an apocalyptic number.

It is an amenable number.

1243525 is a deficient number, since it is larger than the sum of its proper divisors (298477).

1243525 is an equidigital number, since it uses as much as digits as its factorization.

1243525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49751 (or 49746 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 1243525 is about 1115.1345210332. The cubic root of 1243525 is about 107.5354128867.

Adding to 1243525 its reverse (5253421), we get a palindrome (6496946).

The spelling of 1243525 in words is "one million, two hundred forty-three thousand, five hundred twenty-five".