1155020 has 12 divisors (see below), whose sum is σ = 2425584. Its totient is φ = 462000.

The previous prime is 1155019. The next prime is 1155053. The reversal of 1155020 is 205511.

It is a junction number, because it is equal to n+sod(n) for n = 1154986 and 1155004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28856 + ... + 28895.

It is an arithmetic number, because the mean of its divisors is an integer number (202132).

2^1155020 is an apocalyptic number.

1155020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155020 is an abundant number, since it is smaller than the sum of its proper divisors (1270564).

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

1155020 is a wasteful number, since it uses less digits than its factorization.

1155020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57760 (or 57758 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 1155020 is about 1074.7185678121. The cubic root of 1155020 is about 104.9211804549.

The spelling of 1155020 in words is "one million, one hundred fifty-five thousand, twenty".