1538213 has 2 divisors, whose sum is σ = 1538214. Its totient is φ = 1538212.

The previous prime is 1538203. The next prime is 1538227. The reversal of 1538213 is 3128351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 386884 = 1073^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538213 - 2¹⁶ = 1472677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769106 + 769107.

It is an arithmetic number, because the mean of its divisors is an integer number (769107).

2^1538213 is an apocalyptic number.

It is an amenable number.

1538213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538213 is an equidigital number, since it uses as much as digits as its factorization.

1538213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 1538213 is about 1240.2471527885. The cubic root of 1538213 is about 115.4353504632.

The spelling of 1538213 in words is "one million, five hundred thirty-eight thousand, two hundred thirteen".