1020915 has 36 divisors (see below), whose sum is σ = 2062944. Its totient is φ = 465696.

The previous prime is 1020913. The next prime is 1020931. The reversal of 1020915 is 5190201.

It is not a de Polignac number, because 1020915 - 2¹ = 1020913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020913) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1974 + ... + 2436.

It is an arithmetic number, because the mean of its divisors is an integer number (57304).

2^1020915 is an apocalyptic number.

1020915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020915 is an abundant number, since it is smaller than the sum of its proper divisors (1042029).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020915 is a wasteful number, since it uses less digits than its factorization.

1020915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 478 counting only the distinct ones).

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

The square root of 1020915 is about 1010.4033847924. The cubic root of 1020915 is about 100.6923619528.

The spelling of 1020915 in words is "one million, twenty thousand, nine hundred fifteen".