1012721678 has 8 divisors (see below), whose sum is σ = 1537384968. Its totient is φ = 500260024.

The previous prime is 1012721663. The next prime is 1012721701. The reversal of 1012721678 is 8761272101.

1012721678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1012721678² = 2051210394182271368, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3050201 + ... + 3050532.

It is an arithmetic number, because the mean of its divisors is an integer number (192173121).

Almost surely, 2^1012721678 is an apocalyptic number.

1012721678 is a deficient number, since it is larger than the sum of its proper divisors (524663290).

1012721678 is an equidigital number, since it uses as much as digits as its factorization.

1012721678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6100818.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 1012721678 is about 31823.2882964662. The cubic root of 1012721678 is about 1004.2227030139. Note that the first 3 decimals are identical.

Adding to 1012721678 its reverse (8761272101), we get a palindrome (9773993779).

The spelling of 1012721678 in words is "one billion, twelve million, seven hundred twenty-one thousand, six hundred seventy-eight".