1248895139 has 8 divisors (see below), whose sum is σ = 1305131520. Its totient is φ = 1193894856.

The previous prime is 1248895133. The next prime is 1248895159. The reversal of 1248895139 is 9315988421.

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 1248895139 - 2⁸ = 1248894883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248895133) 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, 306959 + ... + 311000.

It is an arithmetic number, because the mean of its divisors is an integer number (163141440).

Almost surely, 2^1248895139 is an apocalyptic number.

1248895139 is a deficient number, since it is larger than the sum of its proper divisors (56236381).

1248895139 is an equidigital number, since it uses as much as digits as its factorization.

1248895139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618049.

The product of its digits is 622080, while the sum is 50.

The square root of 1248895139 is about 35339.7105109818. The cubic root of 1248895139 is about 1076.8998713449.

The spelling of 1248895139 in words is "one billion, two hundred forty-eight million, eight hundred ninety-five thousand, one hundred thirty-nine".