1672125217 has 4 divisors (see below), whose sum is σ = 1911000256. Its totient is φ = 1433250180.

The previous prime is 1672125209. The next prime is 1672125283. The reversal of 1672125217 is 7125212761.

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 an emirpimes, since its reverse is a distinct semiprime: 7125212761 = 101 ⋅70546661.

It is a cyclic number.

It is not a de Polignac number, because 1672125217 - 2³ = 1672125209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672125317) 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, 119437509 + ... + 119437522.

It is an arithmetic number, because the mean of its divisors is an integer number (477750064).

Almost surely, 2^1672125217 is an apocalyptic number.

It is an amenable number.

1672125217 is a deficient number, since it is larger than the sum of its proper divisors (238875039).

1672125217 is an equidigital number, since it uses as much as digits as its factorization.

1672125217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238875038.

The product of its digits is 11760, while the sum is 34.

The square root of 1672125217 is about 40891.6277127727. The cubic root of 1672125217 is about 1186.9240563993.

Adding to 1672125217 its reverse (7125212761), we get a palindrome (8797337978).

The spelling of 1672125217 in words is "one billion, six hundred seventy-two million, one hundred twenty-five thousand, two hundred seventeen".