1278441024217 has 16 divisors (see below), whose sum is σ = 1465848945792. Its totient is φ = 1092229914240.

The previous prime is 1278441024151. The next prime is 1278441024251. The reversal of 1278441024217 is 7124201448721.

It is a cyclic number.

It is not a de Polignac number, because 1278441024217 - 2¹¹ = 1278441022169 is a prime.

It is a super-2 number, since 2×1278441024217² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1278441024517) 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, 4351278 + ... + 4635784.

It is an arithmetic number, because the mean of its divisors is an integer number (91615559112).

Almost surely, 2^{1278441024217} is an apocalyptic number.

It is an amenable number.

1278441024217 is a deficient number, since it is larger than the sum of its proper divisors (187407921575).

1278441024217 is a wasteful number, since it uses less digits than its factorization.

1278441024217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286608.

The product of its (nonzero) digits is 200704, while the sum is 43.

The spelling of 1278441024217 in words is "one trillion, two hundred seventy-eight billion, four hundred forty-one million, twenty-four thousand, two hundred seventeen".