1672724205 has 24 divisors (see below), whose sum is σ = 2999369880. Its totient is φ = 861356160.

The previous prime is 1672724203. The next prime is 1672724227. The reversal of 1672724205 is 5024272761.

It is a happy number.

1672724205 is a `hidden beast` number, since 167 + 2 + 72 + 420 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3674889 + 1669049316 = 1917^2 + 40854^2 .

It is not a de Polignac number, because 1672724205 - 2¹ = 1672724203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1672724205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672724203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 639586 + ... + 642195.

It is an arithmetic number, because the mean of its divisors is an integer number (124973745).

Almost surely, 2^1672724205 is an apocalyptic number.

1672724205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1672724205 is a deficient number, since it is larger than the sum of its proper divisors (1326645675).

1672724205 is a wasteful number, since it uses less digits than its factorization.

1672724205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281821 (or 1281818 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 1672724205 is about 40898.9511479207. The cubic root of 1672724205 is about 1187.0657659603.

Adding to 1672724205 its reverse (5024272761), we get a palindrome (6696996966).

The spelling of 1672724205 in words is "one billion, six hundred seventy-two million, seven hundred twenty-four thousand, two hundred five".