1538281 has 2 divisors, whose sum is σ = 1538282. Its totient is φ = 1538280.

The previous prime is 1538267. The next prime is 1538293. The reversal of 1538281 is 1828351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968256 + 570025 = 984^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538281 - 2¹⁹ = 1013993 is a prime.

It is a super-2 number, since 2×1538281² = 4732616869922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1538261) 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 as a sum of consecutive naturals, namely, 769140 + 769141.

It is an arithmetic number, because the mean of its divisors is an integer number (769141).

2^1538281 is an apocalyptic number.

It is an amenable number.

1538281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538281 is an equidigital number, since it uses as much as digits as its factorization.

1538281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

The square root of 1538281 is about 1240.2745663763. The cubic root of 1538281 is about 115.4370514605.

The spelling of 1538281 in words is "one million, five hundred thirty-eight thousand, two hundred eighty-one".