1270172678 has 4 divisors (see below), whose sum is σ = 1905259020. Its totient is φ = 635086338.

The previous prime is 1270172671. The next prime is 1270172681. The reversal of 1270172678 is 8762710721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8762710721 = 59407 ⋅147503.

It is a super-2 number, since 2×1270172678² = 3226677263875383368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270172671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317543168 + ... + 317543171.

It is an arithmetic number, because the mean of its divisors is an integer number (476314755).

Almost surely, 2^1270172678 is an apocalyptic number.

1270172678 is a deficient number, since it is larger than the sum of its proper divisors (635086342).

1270172678 is an equidigital number, since it uses as much as digits as its factorization.

1270172678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635086341.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 1270172678 is about 35639.4820108261. The cubic root of 1270172678 is about 1082.9812115932.

The spelling of 1270172678 in words is "one billion, two hundred seventy million, one hundred seventy-two thousand, six hundred seventy-eight".