1538345 has 4 divisors (see below), whose sum is σ = 1846020. Its totient is φ = 1230672.

The previous prime is 1538321. The next prime is 1538353. The reversal of 1538345 is 5438351.

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 885481 + 652864 = 941^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538345 - 2⁶ = 1538281 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153830 + ... + 153839.

It is an arithmetic number, because the mean of its divisors is an integer number (461505).

2^1538345 is an apocalyptic number.

It is an amenable number.

1538345 is a deficient number, since it is larger than the sum of its proper divisors (307675).

1538345 is an equidigital number, since it uses as much as digits as its factorization.

1538345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307674.

The product of its digits is 7200, while the sum is 29.

The square root of 1538345 is about 1240.3003668467. The cubic root of 1538345 is about 115.4386523533.

The spelling of 1538345 in words is "one million, five hundred thirty-eight thousand, three hundred forty-five".