1525139 has 16 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 1145760.

The previous prime is 1525133. The next prime is 1525157. The reversal of 1525139 is 9315251.

It is not a de Polignac number, because 1525139 - 2⁴ = 1525123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1892 + ... + 2574.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^1525139 is an apocalyptic number.

1525139 is a deficient number, since it is larger than the sum of its proper divisors (444781).

1525139 is a wasteful number, since it uses less digits than its factorization.

1525139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730.

The product of its digits is 1350, while the sum is 26.

The square root of 1525139 is about 1234.9651816954. The cubic root of 1525139 is about 115.1073729370.

The spelling of 1525139 in words is "one million, five hundred twenty-five thousand, one hundred thirty-nine".