1156530 has 32 divisors (see below), whose sum is σ = 2923200. Its totient is φ = 292032.

The previous prime is 1156523. The next prime is 1156537. The reversal of 1156530 is 356511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1156523) and next prime (1156537).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1156497 and 1156506.

It is not an unprimeable number, because it can be changed into a prime (1156537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (91350).

2^1156530 is an apocalyptic number.

1156530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1156530 is an abundant number, since it is smaller than the sum of its proper divisors (1766670).

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

1156530 is a wasteful number, since it uses less digits than its factorization.

1156530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1156530 is about 1075.4208478545. The cubic root of 1156530 is about 104.9668829800.

The spelling of 1156530 in words is "one million, one hundred fifty-six thousand, five hundred thirty".