1591115 has 8 divisors (see below), whose sum is σ = 2021760. Its totient is φ = 1197952.

The previous prime is 1591103. The next prime is 1591127. The reversal of 1591115 is 5111951.

It is an interprime number because it is at equal distance from previous prime (1591103) and next prime (1591127).

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

It is a cyclic number.

It is not a de Polignac number, because 1591115 - 2⁴ = 1591099 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9275 + ... + 9444.

It is an arithmetic number, because the mean of its divisors is an integer number (252720).

2^1591115 is an apocalyptic number.

1591115 is a deficient number, since it is larger than the sum of its proper divisors (430645).

1591115 is a wasteful number, since it uses less digits than its factorization.

1591115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18741.

The product of its digits is 225, while the sum is 23.

The square root of 1591115 is about 1261.3940700669. The cubic root of 1591115 is about 116.7438083919.

The spelling of 1591115 in words is "one million, five hundred ninety-one thousand, one hundred fifteen".