1242533 has 4 divisors (see below), whose sum is σ = 1259628. Its totient is φ = 1225440.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242533 is 3352421.

It is a happy number.

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 1014049 + 228484 = 1007^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242533 - 2⁴ = 1242517 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 (1242503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8438 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (314907).

2^1242533 is an apocalyptic number.

It is an amenable number.

1242533 is a deficient number, since it is larger than the sum of its proper divisors (17095).

1242533 is an equidigital number, since it uses as much as digits as its factorization.

1242533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17094.

The product of its digits is 720, while the sum is 20.

The square root of 1242533 is about 1114.6896429051. The cubic root of 1242533 is about 107.5068104573.

Adding to 1242533 its reverse (3352421), we get a palindrome (4594954).

The spelling of 1242533 in words is "one million, two hundred forty-two thousand, five hundred thirty-three".