1097151 has 8 divisors (see below), whose sum is σ = 1595904. Its totient is φ = 664920.

The previous prime is 1097147. The next prime is 1097179. The reversal of 1097151 is 1517901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1097151 - 2² = 1097147 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16591 + ... + 16656.

It is an arithmetic number, because the mean of its divisors is an integer number (199488).

2^1097151 is an apocalyptic number.

1097151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1097151 is a deficient number, since it is larger than the sum of its proper divisors (498753).

1097151 is a wasteful number, since it uses less digits than its factorization.

1097151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33261.

The product of its (nonzero) digits is 315, while the sum is 24.

The square root of 1097151 is about 1047.4497601317. The cubic root of 1097151 is about 103.1388143110.

It can be divided in two parts, 109 and 7151, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 1097151 in words is "one million, ninety-seven thousand, one hundred fifty-one".