1025822609 has 16 divisors (see below), whose sum is σ = 1229783040. Its totient is φ = 836618640.

The previous prime is 1025822591. The next prime is 1025822639. The reversal of 1025822609 is 9062285201.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025822609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025822639) 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, 14072 + ... + 47430.

It is an arithmetic number, because the mean of its divisors is an integer number (76861440).

Almost surely, 2^1025822609 is an apocalyptic number.

It is an amenable number.

1025822609 is a deficient number, since it is larger than the sum of its proper divisors (203960431).

1025822609 is a wasteful number, since it uses less digits than its factorization.

1025822609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33580.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1025822609 is about 32028.4656048335. The cubic root of 1025822609 is about 1008.5344915764.

The spelling of 1025822609 in words is "one billion, twenty-five million, eight hundred twenty-two thousand, six hundred nine".