1015920 has 120 divisors (see below), whose sum is σ = 3656016. Its totient is φ = 251904.

The previous prime is 1015919. The next prime is 1015967. The reversal of 1015920 is 295101.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1015893 and 1015902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12199 + ... + 12281.

2^1015920 is an apocalyptic number.

1015920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1015920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828008).

1015920 is an abundant number, since it is smaller than the sum of its proper divisors (2640096).

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

1015920 is a wasteful number, since it uses less digits than its factorization.

1015920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 110 counting only the distinct ones).

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

The square root of 1015920 is about 1007.9285688976. The cubic root of 1015920 is about 100.5278752408.

The spelling of 1015920 in words is "one million, fifteen thousand, nine hundred twenty".