651041 has 4 divisors (see below), whose sum is σ = 652692. Its totient is φ = 649392.

The previous prime is 651029. The next prime is 651043. The reversal of 651041 is 140156.

It is a happy number.

651041 is nontrivially palindromic in base 5.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 364816 + 286225 = 604^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 651041 - 2¹⁰ = 650017 is a prime.

It is a Duffinian number.

651041 is an undulating number in base 5.

It is not an unprimeable number, because it can be changed into a prime (651043) 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 in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 1151.

It is an arithmetic number, because the mean of its divisors is an integer number (163173).

2⁶⁵¹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

651041 is a deficient number, since it is larger than the sum of its proper divisors (1651).

651041 is an equidigital number, since it uses as much as digits as its factorization.

651041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 651041 is about 806.8711173415. The cubic root of 651041 is about 86.6701297104.

Adding to 651041 its reverse (140156), we get a palindrome (791197).

The spelling of 651041 in words is "six hundred fifty-one thousand, forty-one".