1153890 has 24 divisors (see below), whose sum is σ = 3000348. Its totient is φ = 307680.

The previous prime is 1153871. The next prime is 1153891. The reversal of 1153890 is 983511.

It can be written as a sum of positive squares in 2 ways, for example, as 1022121 + 131769 = 1011^2 + 363^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1153891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6321 + ... + 6500.

2^1153890 is an apocalyptic number.

1153890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1153890 is an abundant number, since it is smaller than the sum of its proper divisors (1846458).

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

1153890 is a wasteful number, since it uses less digits than its factorization.

1153890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12834 (or 12831 counting only the distinct ones).

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

The square root of 1153890 is about 1074.1927201392. The cubic root of 1153890 is about 104.8869531633.

It can be divided in two parts, 11538 and 90, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 1153890 in words is "one million, one hundred fifty-three thousand, eight hundred ninety".