1533139 has 2 divisors, whose sum is σ = 1533140. Its totient is φ = 1533138.

The previous prime is 1533137. The next prime is 1533163. The reversal of 1533139 is 9313351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1533139 - 2¹ = 1533137 is a prime.

Together with 1533137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1533137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 766569 + 766570.

It is an arithmetic number, because the mean of its divisors is an integer number (766570).

2^1533139 is an apocalyptic number.

1533139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1533139 is an equidigital number, since it uses as much as digits as its factorization.

1533139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215, while the sum is 25.

The square root of 1533139 is about 1238.1999030851. The cubic root of 1533139 is about 115.3082843645.

The spelling of 1533139 in words is "one million, five hundred thirty-three thousand, one hundred thirty-nine".