1025811 has 8 divisors (see below), whose sum is σ = 1519760. Its totient is φ = 683856.

The previous prime is 1025807. The next prime is 1025819. The reversal of 1025811 is 1185201.

It is not a de Polignac number, because 1025811 - 2² = 1025807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025819) 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, 18970 + ... + 19023.

It is an arithmetic number, because the mean of its divisors is an integer number (189970).

2^1025811 is an apocalyptic number.

1025811 is a deficient number, since it is larger than the sum of its proper divisors (493949).

1025811 is an equidigital number, since it uses as much as digits as its factorization.

1025811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38002 (or 37996 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1025811 is about 1012.8232817229. The cubic root of 1025811 is about 100.8530687111.

The spelling of 1025811 in words is "one million, twenty-five thousand, eight hundred eleven".