253123785 has 20 divisors (see below), whose sum is σ = 453748548. Its totient is φ = 134999136.

The previous prime is 253123781. The next prime is 253123823. The reversal of 253123785 is 587321352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 155825289 + 97298496 = 12483^2 + 9864^2 .

It is not a de Polignac number, because 253123785 - 2² = 253123781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253123781) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 312094 + ... + 312903.

Almost surely, 2^253123785 is an apocalyptic number.

It is an amenable number.

253123785 is a deficient number, since it is larger than the sum of its proper divisors (200624763).

253123785 is an equidigital number, since it uses as much as digits as its factorization.

253123785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625014 (or 625005 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 253123785 is about 15909.8643928853. The cubic root of 253123785 is about 632.5734868555.

The spelling of 253123785 in words is "two hundred fifty-three million, one hundred twenty-three thousand, seven hundred eighty-five".