1538673 has 4 divisors (see below), whose sum is σ = 2051568. Its totient is φ = 1025780.

The previous prime is 1538657. The next prime is 1538701. The reversal of 1538673 is 3768351.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1538673 - 2⁴ = 1538657 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1538633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256443 + ... + 256448.

It is an arithmetic number, because the mean of its divisors is an integer number (512892).

2^1538673 is an apocalyptic number.

It is an amenable number.

1538673 is a deficient number, since it is larger than the sum of its proper divisors (512895).

1538673 is an equidigital number, since it uses as much as digits as its factorization.

1538673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512894.

The product of its digits is 15120, while the sum is 33.

The square root of 1538673 is about 1240.4325858345. The cubic root of 1538673 is about 115.4468562319.

It can be divided in two parts, 1538 and 673, that added together give a triangular number (2211 = T₆₆).

The spelling of 1538673 in words is "one million, five hundred thirty-eight thousand, six hundred seventy-three".