101020825 has 6 divisors (see below), whose sum is σ = 125265854. Its totient is φ = 80816640.

The previous prime is 101020771. The next prime is 101020849. The reversal of 101020825 is 528020101.

It can be written as a sum of positive squares in 3 ways, for example, as 700569 + 100320256 = 837^2 + 10016^2 .

It is not a de Polignac number, because 101020825 - 2²³ = 92632217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2020392 + ... + 2020441.

Almost surely, 2^101020825 is an apocalyptic number.

It is an amenable number.

101020825 is a deficient number, since it is larger than the sum of its proper divisors (24245029).

101020825 is an equidigital number, since it uses as much as digits as its factorization.

101020825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040843 (or 4040838 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 101020825 is about 10050.9116501937. The cubic root of 101020825 is about 465.7329559151.

Adding to 101020825 its reverse (528020101), we get a palindrome (629040926).

The spelling of 101020825 in words is "one hundred one million, twenty thousand, eight hundred twenty-five".