1248288857 has 4 divisors (see below), whose sum is σ = 1259955216. Its totient is φ = 1236622500.

The previous prime is 1248288841. The next prime is 1248288863. The reversal of 1248288857 is 7588828421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7588828421 = 10567 ⋅718163.

It is a cyclic number.

It is not a de Polignac number, because 1248288857 - 2⁴ = 1248288841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1248288799 and 1248288808.

It is not an unprimeable number, because it can be changed into a prime (1248288817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5833019 + ... + 5833232.

It is an arithmetic number, because the mean of its divisors is an integer number (314988804).

Almost surely, 2^1248288857 is an apocalyptic number.

It is an amenable number.

1248288857 is a deficient number, since it is larger than the sum of its proper divisors (11666359).

1248288857 is a wasteful number, since it uses less digits than its factorization.

1248288857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11666358.

The product of its digits is 2293760, while the sum is 53.

The square root of 1248288857 is about 35331.1315556125. The cubic root of 1248288857 is about 1076.7255811082.

The spelling of 1248288857 in words is "one billion, two hundred forty-eight million, two hundred eighty-eight thousand, eight hundred fifty-seven".