1253502305 has 16 divisors (see below), whose sum is σ = 1642457088. Its totient is φ = 910800000.

The previous prime is 1253502301. The next prime is 1253502343. The reversal of 1253502305 is 5032053521.

It is not a de Polignac number, because 1253502305 - 2² = 1253502301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253502301) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53405 + ... + 73205.

It is an arithmetic number, because the mean of its divisors is an integer number (102653568).

Almost surely, 2^1253502305 is an apocalyptic number.

It is an amenable number.

1253502305 is a deficient number, since it is larger than the sum of its proper divisors (388954783).

1253502305 is a wasteful number, since it uses less digits than its factorization.

1253502305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20968.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 1253502305 is about 35404.8344862675. The cubic root of 1253502305 is about 1078.2224718484. Note that the first 3 decimals are identical.

Adding to 1253502305 its reverse (5032053521), we get a palindrome (6285555826).

The spelling of 1253502305 in words is "one billion, two hundred fifty-three million, five hundred two thousand, three hundred five".