1246249989 has 8 divisors (see below), whose sum is σ = 1846296320. Its totient is φ = 830833308.

The previous prime is 1246249969. The next prime is 1246249997. The reversal of 1246249989 is 9899426421.

1246249989 is a `hidden beast` number, since 1 + 2 + 4 + 624 + 9 + 9 + 8 + 9 = 666.

It is not a de Polignac number, because 1246249989 - 2²⁷ = 1112032261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246249969) 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, 23078677 + ... + 23078730.

It is an arithmetic number, because the mean of its divisors is an integer number (230787040).

Almost surely, 2^1246249989 is an apocalyptic number.

It is an amenable number.

1246249989 is a deficient number, since it is larger than the sum of its proper divisors (600046331).

1246249989 is an equidigital number, since it uses as much as digits as its factorization.

1246249989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46157416 (or 46157410 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 1246249989 is about 35302.2660604103. The cubic root of 1246249989 is about 1076.1390454884.

The spelling of 1246249989 in words is "one billion, two hundred forty-six million, two hundred forty-nine thousand, nine hundred eighty-nine".