253487865 has 8 divisors (see below), whose sum is σ = 405580608. Its totient is φ = 135193520.

The previous prime is 253487863. The next prime is 253487887. The reversal of 253487865 is 568784352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253487865 - 2¹ = 253487863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253487863) 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 7 ways as a sum of consecutive naturals, for example, 8449581 + ... + 8449610.

It is an arithmetic number, because the mean of its divisors is an integer number (50697576).

Almost surely, 2^253487865 is an apocalyptic number.

It is an amenable number.

253487865 is a deficient number, since it is larger than the sum of its proper divisors (152092743).

253487865 is a wasteful number, since it uses less digits than its factorization.

253487865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16899199.

The product of its digits is 1612800, while the sum is 48.

The square root of 253487865 is about 15921.3022394527. The cubic root of 253487865 is about 632.8766284226.

The spelling of 253487865 in words is "two hundred fifty-three million, four hundred eighty-seven thousand, eight hundred sixty-five".