1078191 has 32 divisors (see below), whose sum is σ = 1771200. Its totient is φ = 653184.

The previous prime is 1078183. The next prime is 1078199. The reversal of 1078191 is 1918701.

It is an interprime number because it is at equal distance from previous prime (1078183) and next prime (1078199).

It is not a de Polignac number, because 1078191 - 2³ = 1078183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37165 + ... + 37193.

It is an arithmetic number, because the mean of its divisors is an integer number (55350).

2^1078191 is an apocalyptic number.

1078191 is a deficient number, since it is larger than the sum of its proper divisors (693009).

1078191 is an frugal number, since it uses more digits than its factorization.

1078191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1078191 is about 1038.3597642436. The cubic root of 1078191 is about 102.5412405929.

The spelling of 1078191 in words is "one million, seventy-eight thousand, one hundred ninety-one".