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630541 = 5311897
BaseRepresentation
bin10011001111100001101
31012000221101
42121330031
5130134131
621303101
75234212
oct2317415
91160841
10630541
113a080a
12264a91
13191002
14125b09
15c6c61
hex99f0d

630541 has 4 divisors (see below), whose sum is σ = 642492. Its totient is φ = 618592.

The previous prime is 630529. The next prime is 630559. The reversal of 630541 is 145036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 570025 + 60516 = 755^2 + 246^2 .

It is a cyclic number.

It is not a de Polignac number, because 630541 - 29 = 630029 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630521) 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, 5896 + ... + 6001.

It is an arithmetic number, because the mean of its divisors is an integer number (160623).

2630541 is an apocalyptic number.

It is an amenable number.

630541 is a deficient number, since it is larger than the sum of its proper divisors (11951).

630541 is a wasteful number, since it uses less digits than its factorization.

630541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11950.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 630541 is about 794.0661181539. The cubic root of 630541 is about 85.7507203571.

Adding to 630541 its reverse (145036), we get a palindrome (775577).

The spelling of 630541 in words is "six hundred thirty thousand, five hundred forty-one".

Divisors: 1 53 11897 630541