1001253525 has 24 divisors (see below), whose sum is σ = 1656334464. Its totient is φ = 533702400.

The previous prime is 1001253511. The next prime is 1001253529. The reversal of 1001253525 is 5253521001.

It is a happy number.

It is not a de Polignac number, because 1001253525 - 2⁵ = 1001253493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001253495 and 1001253504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001253529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217245 + ... + 221805.

It is an arithmetic number, because the mean of its divisors is an integer number (69013936).

Almost surely, 2^1001253525 is an apocalyptic number.

1001253525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001253525 is a deficient number, since it is larger than the sum of its proper divisors (655080939).

1001253525 is a wasteful number, since it uses less digits than its factorization.

1001253525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7501 (or 7496 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1001253525 is about 31642.5903648864. The cubic root of 1001253525 is about 1000.4176671965.

Adding to 1001253525 its reverse (5253521001), we get a palindrome (6254774526).

The spelling of 1001253525 in words is "one billion, one million, two hundred fifty-three thousand, five hundred twenty-five".