1297533 has 4 divisors (see below), whose sum is σ = 1730048. Its totient is φ = 865020.

The previous prime is 1297523. The next prime is 1297537. The reversal of 1297533 is 3357921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1297533 - 2⁵ = 1297501 is a prime.

It is a D-number.

It is a Duffinian number.

1297533 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1297533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297537) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 216253 + ... + 216258.

It is an arithmetic number, because the mean of its divisors is an integer number (432512).

2^1297533 is an apocalyptic number.

It is an amenable number.

1297533 is a deficient number, since it is larger than the sum of its proper divisors (432515).

1297533 is an equidigital number, since it uses as much as digits as its factorization.

1297533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432514.

The product of its digits is 5670, while the sum is 30.

The square root of 1297533 is about 1139.0930602896. The cubic root of 1297533 is about 109.0702069933.

It can be divided in two parts, 1297 and 533, that added together give a triangular number (1830 = T₆₀).

The spelling of 1297533 in words is "one million, two hundred ninety-seven thousand, five hundred thirty-three".