1248860257 has 4 divisors (see below), whose sum is σ = 1270027440. Its totient is φ = 1227693076.

The previous prime is 1248860243. The next prime is 1248860281. The reversal of 1248860257 is 7520688421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248860257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248860227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10583503 + ... + 10583620.

It is an arithmetic number, because the mean of its divisors is an integer number (317506860).

Almost surely, 2^1248860257 is an apocalyptic number.

It is an amenable number.

1248860257 is a deficient number, since it is larger than the sum of its proper divisors (21167183).

1248860257 is an equidigital number, since it uses as much as digits as its factorization.

1248860257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21167182.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 1248860257 is about 35339.2169834024. The cubic root of 1248860257 is about 1076.8898452107.

The spelling of 1248860257 in words is "one billion, two hundred forty-eight million, eight hundred sixty thousand, two hundred fifty-seven".