1145890 has 32 divisors (see below), whose sum is σ = 2243520. Its totient is φ = 419904.

The previous prime is 1145873. The next prime is 1145897. The reversal of 1145890 is 985411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6949 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (70110).

2^1145890 is an apocalyptic number.

1145890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1145890 is a deficient number, since it is larger than the sum of its proper divisors (1097630).

1145890 is a wasteful number, since it uses less digits than its factorization.

1145890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1145890 is about 1070.4625168590. The cubic root of 1145890 is about 104.6439946205.

The spelling of 1145890 in words is "one million, one hundred forty-five thousand, eight hundred ninety".