7142647 has 4 divisors (see below), whose sum is σ = 7149376. Its totient is φ = 7135920.

The previous prime is 7142633. The next prime is 7142659. The reversal of 7142647 is 7462417.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7462417 = 293 ⋅25469.

It is a cyclic number.

It is not a de Polignac number, because 7142647 - 2⁷ = 7142519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383 + ... + 4024.

It is an arithmetic number, because the mean of its divisors is an integer number (1787344).

Almost surely, 2^7142647 is an apocalyptic number.

7142647 is a deficient number, since it is larger than the sum of its proper divisors (6729).

7142647 is a wasteful number, since it uses less digits than its factorization.

7142647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6728.

The product of its digits is 9408, while the sum is 31.

The square root of 7142647 is about 2672.5731047064. The cubic root of 7142647 is about 192.5837899133.

The spelling of 7142647 in words is "seven million, one hundred forty-two thousand, six hundred forty-seven".