1020115 has 4 divisors (see below), whose sum is σ = 1224144. Its totient is φ = 816088.

The previous prime is 1020113. The next prime is 1020137. The reversal of 1020115 is 5110201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5110201 = 1453 ⋅3517.

It is a cyclic number.

It is not a de Polignac number, because 1020115 - 2¹ = 1020113 is a prime.

It is a super-2 number, since 2×1020115² = 2081269226450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102007 + ... + 102016.

It is an arithmetic number, because the mean of its divisors is an integer number (306036).

2^1020115 is an apocalyptic number.

1020115 is a deficient number, since it is larger than the sum of its proper divisors (204029).

1020115 is an equidigital number, since it uses as much as digits as its factorization.

1020115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204028.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 1020115 is about 1010.0074257153. The cubic root of 1020115 is about 100.6660538730. Note that the first 3 decimals are identical.

Adding to 1020115 its reverse (5110201), we get a palindrome (6130316).

The spelling of 1020115 in words is "one million, twenty thousand, one hundred fifteen".