1538671 has 4 divisors (see below), whose sum is σ = 1544392. Its totient is φ = 1532952.

The previous prime is 1538657. The next prime is 1538701. The reversal of 1538671 is 1768351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1768351 = 13 ⋅136027.

It is a cyclic number.

It is not a de Polignac number, because 1538671 - 2¹⁷ = 1407599 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538611) 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, 2436 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (386098).

2^1538671 is an apocalyptic number.

1538671 is a deficient number, since it is larger than the sum of its proper divisors (5721).

1538671 is an equidigital number, since it uses as much as digits as its factorization.

1538671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720.

The product of its digits is 5040, while the sum is 31.

The square root of 1538671 is about 1240.4317796638. The cubic root of 1538671 is about 115.4468062118.

It can be divided in two parts, 1538 and 671, that added together give a square (2209 = 47²).

The spelling of 1538671 in words is "one million, five hundred thirty-eight thousand, six hundred seventy-one".