1246078081 has 8 divisors (see below), whose sum is σ = 1263026600. Its totient is φ = 1229230080.

The previous prime is 1246078073. The next prime is 1246078117. The reversal of 1246078081 is 1808706421.

1246078081 is a nontrivial binomial coefficient, being equal to C(49922, 2).

It can be written as a sum of positive squares in 4 ways, for example, as 849431025 + 396647056 = 29145^2 + 19916^2 .

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 1246078081 - 2³ = 1246078073 is a prime.

It is a super-2 number, since 2×1246078081² = 3105421167897285122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1246078081.

It is not an unprimeable number, because it can be changed into a prime (1246078021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 49921.

It is an arithmetic number, because the mean of its divisors is an integer number (157878325).

Almost surely, 2^1246078081 is an apocalyptic number.

1246078081 is the 49921-st triangular number and also the 24961-st hexagonal number.

1246078081 is the 16641-st centered nonagonal number.

It is an amenable number.

1246078081 is a deficient number, since it is larger than the sum of its proper divisors (16948519).

1246078081 is a wasteful number, since it uses less digits than its factorization.

1246078081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50259.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 1246078081 is about 35299.8311752337. The cubic root of 1246078081 is about 1076.0895622602.

The spelling of 1246078081 in words is "one billion, two hundred forty-six million, seventy-eight thousand, eighty-one".