1002039025 has 27 divisors (see below), whose sum is σ = 1348228161. Its totient is φ = 738447840.

The previous prime is 1002038969. The next prime is 1002039029. The reversal of 1002039025 is 5209302001.

The square root of 1002039025 is 31655.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 258277041 + 743761984 = 16071^2 + 27272^2 .

It is not a de Polignac number, because 1002039025 - 2¹¹ = 1002036977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002038987 and 1002039005.

It is not an unprimeable number, because it can be changed into a prime (1002039029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2057332 + ... + 2057818.

Almost surely, 2^1002039025 is an apocalyptic number.

1002039025 is the 31655-th square number.

1002039025 is the 15828-th centered octagonal number.

It is an amenable number.

1002039025 is a deficient number, since it is larger than the sum of its proper divisors (346189136).

1002039025 is an frugal number, since it uses more digits than its factorization.

1002039025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The cubic root of 1002039025 is about 1000.6792135645.

The spelling of 1002039025 in words is "one billion, two million, thirty-nine thousand, twenty-five".