1251533 has 2 divisors, whose sum is σ = 1251534. Its totient is φ = 1251532.

The previous prime is 1251529. The next prime is 1251571. The reversal of 1251533 is 3351521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1247689 + 3844 = 1117^2 + 62^2 .

It is an emirp because it is prime and its reverse (3351521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1251533 - 2² = 1251529 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625766 + 625767.

It is an arithmetic number, because the mean of its divisors is an integer number (625767).

2^1251533 is an apocalyptic number.

It is an amenable number.

1251533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251533 is an equidigital number, since it uses as much as digits as its factorization.

1251533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 20.

The square root of 1251533 is about 1118.7193571222. The cubic root of 1251533 is about 107.7657531567.

The spelling of 1251533 in words is "one million, two hundred fifty-one thousand, five hundred thirty-three".