1025890 has 16 divisors (see below), whose sum is σ = 1860408. Its totient is φ = 407296.

The previous prime is 1025887. The next prime is 1025891. The reversal of 1025890 is 985201.

It can be written as a sum of positive squares in 4 ways, for example, as 998001 + 27889 = 999^2 + 167^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1025891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434 + ... + 2026.

2^1025890 is an apocalyptic number.

1025890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1025890 is a deficient number, since it is larger than the sum of its proper divisors (834518).

1025890 is a wasteful number, since it uses less digits than its factorization.

1025890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1025890 is about 1012.8622808655. The cubic root of 1025890 is about 100.8556576181.

The spelling of 1025890 in words is "one million, twenty-five thousand, eight hundred ninety".