1109375 has 14 divisors (see below), whose sum is σ = 1406232. Its totient is φ = 875000.

The previous prime is 1109363. The next prime is 1109387. The reversal of 1109375 is 5739011.

It is an interprime number because it is at equal distance from previous prime (1109363) and next prime (1109387).

It is not a de Polignac number, because 1109375 - 2¹⁴ = 1092991 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15590 + ... + 15660.

2^1109375 is an apocalyptic number.

1109375 is a deficient number, since it is larger than the sum of its proper divisors (296857).

1109375 is an frugal number, since it uses more digits than its factorization.

1109375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 1109375 is about 1053.2687216470. The cubic root of 1109375 is about 103.5204437356.

The spelling of 1109375 in words is "one million, one hundred nine thousand, three hundred seventy-five".