647141 has 4 divisors (see below), whose sum is σ = 705984. Its totient is φ = 588300.

The previous prime is 647131. The next prime is 647147. The reversal of 647141 is 141746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647141 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 (647147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29405 + ... + 29426.

It is an arithmetic number, because the mean of its divisors is an integer number (176496).

2⁶⁴⁷¹⁴¹ is an apocalyptic number.

It is an amenable number.

647141 is a deficient number, since it is larger than the sum of its proper divisors (58843).

647141 is a wasteful number, since it uses less digits than its factorization.

647141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58842.

The product of its digits is 672, while the sum is 23.

The square root of 647141 is about 804.4507442970. The cubic root of 647141 is about 86.4967198908.

Adding to 647141 its reverse (141746), we get a palindrome (788887).

The spelling of 647141 in words is "six hundred forty-seven thousand, one hundred forty-one".