1253012565 has 48 divisors (see below), whose sum is σ = 2355367680. Its totient is φ = 567100800.

The previous prime is 1253012543. The next prime is 1253012573. The reversal of 1253012565 is 5652103521.

It is a happy number.

It is not a de Polignac number, because 1253012565 - 2⁹ = 1253012053 is a prime.

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 65796 + ... + 82674.

It is an arithmetic number, because the mean of its divisors is an integer number (49070160).

Almost surely, 2^1253012565 is an apocalyptic number.

1253012565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253012565 is a deficient number, since it is larger than the sum of its proper divisors (1102355115).

1253012565 is a wasteful number, since it uses less digits than its factorization.

1253012565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17002 (or 16995 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1253012565 is about 35397.9175234928. The cubic root of 1253012565 is about 1078.0820340113.

The spelling of 1253012565 in words is "one billion, two hundred fifty-three million, twelve thousand, five hundred sixty-five".