1001025 has 24 divisors (see below), whose sum is σ = 1840160. Its totient is φ = 533520.

The previous prime is 1001023. The next prime is 1001027. The reversal of 1001025 is 5201001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1001023) and next prime (1001027).

It is not a de Polignac number, because 1001025 - 2¹ = 1001023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1000998 and 1001016.

It is not an unprimeable number, because it can be changed into a prime (1001023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67 + ... + 1416.

2^1001025 is an apocalyptic number.

1001025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001025 is a deficient number, since it is larger than the sum of its proper divisors (839135).

1001025 is a wasteful number, since it uses less digits than its factorization.

1001025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1001025 is about 1000.5123687391. The cubic root of 1001025 is about 100.0341549997.

Adding to 1001025 its reverse (5201001), we get a palindrome (6202026).

The spelling of 1001025 in words is "one million, one thousand, twenty-five".