1158720 has 112 divisors (see below), whose sum is σ = 3950208. Its totient is φ = 286720.

The previous prime is 1158719. The next prime is 1158743. The reversal of 1158720 is 278511.

1158720 = T₁₄₄ + T₁₄₅ + ... + T₂₁₄.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 16285 + ... + 16355.

2^1158720 is an apocalyptic number.

1158720 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 1158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1975104).

1158720 is an abundant number, since it is smaller than the sum of its proper divisors (2791488).

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

1158720 is a wasteful number, since it uses less digits than its factorization.

1158720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1158720 is about 1076.4385723301. The cubic root of 1158720 is about 105.0330961429.

The spelling of 1158720 in words is "one million, one hundred fifty-eight thousand, seven hundred twenty".