7981275 has 12 divisors (see below), whose sum is σ = 13195832. Its totient is φ = 4256640.

The previous prime is 7981247. The next prime is 7981283. The reversal of 7981275 is 5721897.

It is not a de Polignac number, because 7981275 - 2⁷ = 7981147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53134 + ... + 53283.

Almost surely, 2^7981275 is an apocalyptic number.

7981275 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7981275 is a deficient number, since it is larger than the sum of its proper divisors (5214557).

7981275 is a wasteful number, since it uses less digits than its factorization.

7981275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106430 (or 106425 counting only the distinct ones).

The product of its digits is 35280, while the sum is 39.

The square root of 7981275 is about 2825.1150419054. The cubic root of 7981275 is about 199.8438364298.

It can be divided in two parts, 7981 and 275, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 7981275 in words is "seven million, nine hundred eighty-one thousand, two hundred seventy-five".