1248424091 has 2 divisors, whose sum is σ = 1248424092. Its totient is φ = 1248424090.

The previous prime is 1248424081. The next prime is 1248424139. The reversal of 1248424091 is 1904248421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1248424091 - 2²² = 1244229787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1248424081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624212045 + 624212046.

It is an arithmetic number, because the mean of its divisors is an integer number (624212046).

Almost surely, 2^1248424091 is an apocalyptic number.

1248424091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248424091 is an equidigital number, since it uses as much as digits as its factorization.

1248424091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1248424091 is about 35333.0453117192. The cubic root of 1248424091 is about 1076.7644622397.

The spelling of 1248424091 in words is "one billion, two hundred forty-eight million, four hundred twenty-four thousand, ninety-one".