1253505239 has 4 divisors (see below), whose sum is σ = 1432577424. Its totient is φ = 1074433056.

The previous prime is 1253505233. The next prime is 1253505257. The reversal of 1253505239 is 9325053521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9325053521 = 7 ⋅1332150503.

It is a cyclic number.

It is not a de Polignac number, because 1253505239 - 2¹² = 1253501143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1253505199 and 1253505208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253505233) 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 3 ways as a sum of consecutive naturals, for example, 89536082 + ... + 89536095.

It is an arithmetic number, because the mean of its divisors is an integer number (358144356).

Almost surely, 2^1253505239 is an apocalyptic number.

1253505239 is a deficient number, since it is larger than the sum of its proper divisors (179072185).

1253505239 is an equidigital number, since it uses as much as digits as its factorization.

1253505239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179072184.

The product of its (nonzero) digits is 40500, while the sum is 35.

The square root of 1253505239 is about 35404.8759212626. The cubic root of 1253505239 is about 1078.2233130919.

The spelling of 1253505239 in words is "one billion, two hundred fifty-three million, five hundred five thousand, two hundred thirty-nine".