1153980 has 48 divisors (see below), whose sum is σ = 3591840. Its totient is φ = 307584.

The previous prime is 1153973. The next prime is 1154017. The reversal of 1153980 is 893511.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (74830).

2^1153980 is an apocalyptic number.

1153980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153980 is an abundant number, since it is smaller than the sum of its proper divisors (2437860).

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

1153980 is a wasteful number, since it uses less digits than its factorization.

1153980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1153980 is about 1074.2346112465. The cubic root of 1153980 is about 104.8896800495.

It can be divided in two parts, 115 and 3980, that added together give a triangular number (4095 = T₉₀).

The spelling of 1153980 in words is "one million, one hundred fifty-three thousand, nine hundred eighty".