1545139 has 2 divisors, whose sum is σ = 1545140. Its totient is φ = 1545138.

The previous prime is 1545127. The next prime is 1545143. The reversal of 1545139 is 9315451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1545139 - 2⁵ = 1545107 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1545169) 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, 772569 + 772570.

It is an arithmetic number, because the mean of its divisors is an integer number (772570).

2^1545139 is an apocalyptic number.

1545139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545139 is an equidigital number, since it uses as much as digits as its factorization.

1545139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 1545139 is about 1243.0362022081. The cubic root of 1545139 is about 115.6083452028.

It can be divided in two parts, 15 and 45139, that added together give a palindrome (45154).

The spelling of 1545139 in words is "one million, five hundred forty-five thousand, one hundred thirty-nine".