1291125 has 32 divisors (see below), whose sum is σ = 2351232. Its totient is φ = 624000.

The previous prime is 1291117. The next prime is 1291139. The reversal of 1291125 is 5211921.

1291125 = T₄₇₉ + T₄₈₀ + ... + T₄₈₉.

It is not a de Polignac number, because 1291125 - 2³ = 1291117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3969 + ... + 4281.

It is an arithmetic number, because the mean of its divisors is an integer number (73476).

2^1291125 is an apocalyptic number.

1291125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1291125 is a deficient number, since it is larger than the sum of its proper divisors (1060107).

1291125 is a wasteful number, since it uses less digits than its factorization.

1291125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 332 counting only the distinct ones).

The product of its digits is 180, while the sum is 21.

The square root of 1291125 is about 1136.2768148651. The cubic root of 1291125 is about 108.8903591283.

The spelling of 1291125 in words is "one million, two hundred ninety-one thousand, one hundred twenty-five".