7142665 has 8 divisors (see below), whose sum is σ = 8803080. Its totient is φ = 5559552.

The previous prime is 7142659. The next prime is 7142699. The reversal of 7142665 is 5662417.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1281424 + 5861241 = 1132^2 + 2421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7142665 - 2⁵ = 7142633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19120 + ... + 19489.

It is an arithmetic number, because the mean of its divisors is an integer number (1100385).

Almost surely, 2^7142665 is an apocalyptic number.

It is an amenable number.

7142665 is a deficient number, since it is larger than the sum of its proper divisors (1660415).

7142665 is a wasteful number, since it uses less digits than its factorization.

7142665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38651.

The product of its digits is 10080, while the sum is 31.

The square root of 7142665 is about 2672.5764722455. The cubic root of 7142665 is about 192.5839516883.

The spelling of 7142665 in words is "seven million, one hundred forty-two thousand, six hundred sixty-five".