650042501 has 4 divisors (see below), whose sum is σ = 650110752. Its totient is φ = 649974252.

The previous prime is 650042489. The next prime is 650042507. The reversal of 650042501 is 105240056.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 650042501 - 2¹⁰ = 650041477 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 (650042507) 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, 16961 + ... + 39846.

It is an arithmetic number, because the mean of its divisors is an integer number (162527688).

Almost surely, 2^650042501 is an apocalyptic number.

It is an amenable number.

650042501 is a deficient number, since it is larger than the sum of its proper divisors (68251).

650042501 is a wasteful number, since it uses less digits than its factorization.

650042501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68250.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 650042501 is about 25495.9310675253. The cubic root of 650042501 is about 866.2579849439.

Adding to 650042501 its reverse (105240056), we get a palindrome (755282557).

The spelling of 650042501 in words is "six hundred fifty million, forty-two thousand, five hundred one".