7140866 has 4 divisors (see below), whose sum is σ = 10711302. Its totient is φ = 3570432.

The previous prime is 7140863. The next prime is 7140883. The reversal of 7140866 is 6680417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6680417 = 41 ⋅162937.

It can be written as a sum of positive squares in only one way, i.e., 4532641 + 2608225 = 2129^2 + 1615^2 .

It is not an unprimeable number, because it can be changed into a prime (7140863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1785215 + ... + 1785218.

Almost surely, 2^7140866 is an apocalyptic number.

7140866 is a deficient number, since it is larger than the sum of its proper divisors (3570436).

7140866 is a wasteful number, since it uses less digits than its factorization.

7140866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570435.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 7140866 is about 2672.2398844415. The cubic root of 7140866 is about 192.5677818311.

The spelling of 7140866 in words is "seven million, one hundred forty thousand, eight hundred sixty-six".