1025129 has 6 divisors (see below), whose sum is σ = 1192554. Its totient is φ = 878640.

The previous prime is 1025119. The next prime is 1025137. The reversal of 1025129 is 9215201.

It can be written as a sum of positive squares in only one way, i.e., 946729 + 78400 = 973^2 + 280^2 .

It is not a de Polignac number, because 1025129 - 2⁴ = 1025113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025129.

It is not an unprimeable number, because it can be changed into a prime (1025119) 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 5 ways as a sum of consecutive naturals, for example, 10412 + ... + 10509.

It is an arithmetic number, because the mean of its divisors is an integer number (198759).

2^1025129 is an apocalyptic number.

It is an amenable number.

1025129 is a deficient number, since it is larger than the sum of its proper divisors (167425).

1025129 is an equidigital number, since it uses as much as digits as its factorization.

1025129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20935 (or 20928 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1025129 is about 1012.4865431205. The cubic root of 1025129 is about 100.8307133774.

The spelling of 1025129 in words is "one million, twenty-five thousand, one hundred twenty-nine".