1248165257 has 8 divisors (see below), whose sum is σ = 1277692416. Its totient is φ = 1218660912.

The previous prime is 1248165241. The next prime is 1248165263. The reversal of 1248165257 is 7525618421.

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

It is a cyclic number.

It is not a de Polignac number, because 1248165257 - 2⁴ = 1248165241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248165277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162968 + ... + 170454.

It is an arithmetic number, because the mean of its divisors is an integer number (159711552).

Almost surely, 2^1248165257 is an apocalyptic number.

It is an amenable number.

1248165257 is a deficient number, since it is larger than the sum of its proper divisors (29527159).

1248165257 is an equidigital number, since it uses as much as digits as its factorization.

1248165257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11407.

The product of its digits is 134400, while the sum is 41.

The square root of 1248165257 is about 35329.3823467097. The cubic root of 1248165257 is about 1076.6900424123.

The spelling of 1248165257 in words is "one billion, two hundred forty-eight million, one hundred sixty-five thousand, two hundred fifty-seven".