1025405205 has 64 divisors (see below), whose sum is σ = 1966049280. Its totient is φ = 450489600.

The previous prime is 1025405189. The next prime is 1025405207. The reversal of 1025405205 is 5025045201.

It is a happy number.

It is not a de Polignac number, because 1025405205 - 2⁴ = 1025405189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025405207) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64995 + ... + 79215.

It is an arithmetic number, because the mean of its divisors is an integer number (30719520).

Almost surely, 2^1025405205 is an apocalyptic number.

1025405205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1025405205 is a deficient number, since it is larger than the sum of its proper divisors (940644075).

1025405205 is a wasteful number, since it uses less digits than its factorization.

1025405205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14282.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 1025405205 is about 32021.9488007835. The cubic root of 1025405205 is about 1008.3976831793.

The spelling of 1025405205 in words is "one billion, twenty-five million, four hundred five thousand, two hundred five".