1020025851 has 8 divisors (see below), whose sum is σ = 1464652560. Its totient is φ = 627708192.

The previous prime is 1020025847. The next prime is 1020025859. The reversal of 1020025851 is 1585200201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020025851 - 2² = 1020025847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020025859) 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, 13077216 + ... + 13077293.

It is an arithmetic number, because the mean of its divisors is an integer number (183081570).

Almost surely, 2^1020025851 is an apocalyptic number.

1020025851 is a deficient number, since it is larger than the sum of its proper divisors (444626709).

1020025851 is a wasteful number, since it uses less digits than its factorization.

1020025851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26154525.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1020025851 is about 31937.8435558821. The cubic root of 1020025851 is about 1006.6312134764.

The spelling of 1020025851 in words is "one billion, twenty million, twenty-five thousand, eight hundred fifty-one".