1072178878421 has 16 divisors (see below), whose sum is σ = 1235041302528. Its totient is φ = 911743825200.

The previous prime is 1072178878261. The next prime is 1072178878439. The reversal of 1072178878421 is 1248788712701.

It is a cyclic number.

It is not a de Polignac number, because 1072178878421 - 2¹⁰ = 1072178877397 is a prime.

It is a super-2 number, since 2×1072178878421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072178878621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3207056 + ... + 3525558.

It is an arithmetic number, because the mean of its divisors is an integer number (77190081408).

Almost surely, 2^{1072178878421} is an apocalyptic number.

It is an amenable number.

1072178878421 is a deficient number, since it is larger than the sum of its proper divisors (162862424107).

1072178878421 is a wasteful number, since it uses less digits than its factorization.

1072178878421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322312.

The product of its (nonzero) digits is 2809856, while the sum is 56.

The spelling of 1072178878421 in words is "one trillion, seventy-two billion, one hundred seventy-eight million, eight hundred seventy-eight thousand, four hundred twenty-one".