1045890 has 24 divisors (see below), whose sum is σ = 2719548. Its totient is φ = 278880.

The previous prime is 1045859. The next prime is 1045903. The reversal of 1045890 is 985401.

It can be written as a sum of positive squares in 2 ways, for example, as 938961 + 106929 = 969^2 + 327^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5721 + ... + 5900.

2^1045890 is an apocalyptic number.

1045890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1045890 is an abundant number, since it is smaller than the sum of its proper divisors (1673658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045890 is a wasteful number, since it uses less digits than its factorization.

1045890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11634 (or 11631 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1045890 is about 1022.6876355955. The cubic root of 1045890 is about 101.5068467479.

The spelling of 1045890 in words is "one million, forty-five thousand, eight hundred ninety".