1248612191 has 2 divisors, whose sum is σ = 1248612192. Its totient is φ = 1248612190.

The previous prime is 1248612187. The next prime is 1248612217. The reversal of 1248612191 is 1912168421.

It is a weak prime.

It is an emirp because it is prime and its reverse (1912168421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1248612191 - 2² = 1248612187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248612091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624306095 + 624306096.

It is an arithmetic number, because the mean of its divisors is an integer number (624306096).

Almost surely, 2^1248612191 is an apocalyptic number.

1248612191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248612191 is an equidigital number, since it uses as much as digits as its factorization.

1248612191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 35.

The square root of 1248612191 is about 35335.7070256136. The cubic root of 1248612191 is about 1076.8185382078.

The spelling of 1248612191 in words is "one billion, two hundred forty-eight million, six hundred twelve thousand, one hundred ninety-one".