1125890 has 8 divisors (see below), whose sum is σ = 2026620. Its totient is φ = 450352.

The previous prime is 1125871. The next prime is 1125899. The reversal of 1125890 is 985211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1125721 + 169 = 1061^2 + 13^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1125899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56285 + ... + 56304.

2^1125890 is an apocalyptic number.

1125890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125890 is a deficient number, since it is larger than the sum of its proper divisors (900730).

1125890 is a wasteful number, since it uses less digits than its factorization.

1125890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112596.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1125890 is about 1061.0796388585. The cubic root of 1125890 is about 104.0316102138.

The spelling of 1125890 in words is "one million, one hundred twenty-five thousand, eight hundred ninety".