1020195 has 40 divisors (see below), whose sum is σ = 2003760. Its totient is φ = 492480.

The previous prime is 1020163. The next prime is 1020223. The reversal of 1020195 is 5910201.

1020195 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1020195 - 2⁵ = 1020163 is a prime.

1020195 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4341 + ... + 4569.

It is an arithmetic number, because the mean of its divisors is an integer number (50094).

2^1020195 is an apocalyptic number.

1020195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020195 is a deficient number, since it is larger than the sum of its proper divisors (983565).

1020195 is a wasteful number, since it uses less digits than its factorization.

1020195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1020195 is about 1010.0470286081. The cubic root of 1020195 is about 100.6686852998.

Adding to 1020195 its reverse (5910201), we get a palindrome (6930396).

It can be divided in two parts, 10201 and 95, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 1020195 in words is "one million, twenty thousand, one hundred ninety-five".