1253502505 has 4 divisors (see below), whose sum is σ = 1504203012. Its totient is φ = 1002802000.

The previous prime is 1253502493. The next prime is 1253502517. The reversal of 1253502505 is 5052053521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5052053521 = 10141 ⋅498181.

It is an interprime number because it is at equal distance from previous prime (1253502493) and next prime (1253502517).

It can be written as a sum of positive squares in 2 ways, for example, as 800493849 + 453008656 = 28293^2 + 21284^2 .

It is not a de Polignac number, because 1253502505 - 2⁵ = 1253502473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125350246 + ... + 125350255.

It is an arithmetic number, because the mean of its divisors is an integer number (376050753).

Almost surely, 2^1253502505 is an apocalyptic number.

It is an amenable number.

1253502505 is a deficient number, since it is larger than the sum of its proper divisors (250700507).

1253502505 is an equidigital number, since it uses as much as digits as its factorization.

1253502505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250700506.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 1253502505 is about 35404.8373107405. The cubic root of 1253502505 is about 1078.2225291929. Note that the first 3 decimals are identical.

The spelling of 1253502505 in words is "one billion, two hundred fifty-three million, five hundred two thousand, five hundred five".