1025435805 has 16 divisors (see below), whose sum is σ = 1641237120. Its totient is φ = 546719168.

The previous prime is 1025435783. The next prime is 1025435809. The reversal of 1025435805 is 5085345201.

It is a cyclic number.

It is not a de Polignac number, because 1025435805 - 2⁵ = 1025435773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025435809) 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, 44911 + ... + 63779.

It is an arithmetic number, because the mean of its divisors is an integer number (102577320).

Almost surely, 2^1025435805 is an apocalyptic number.

1025435805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1025435805 is a deficient number, since it is larger than the sum of its proper divisors (615801315).

1025435805 is a wasteful number, since it uses less digits than its factorization.

1025435805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22500.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 1025435805 is about 32022.4265944978. The cubic root of 1025435805 is about 1008.4077139008.

The spelling of 1025435805 in words is "one billion, twenty-five million, four hundred thirty-five thousand, eight hundred five".