1233540 has 144 divisors (see below), whose sum is σ = 4717440. Its totient is φ = 253440.

The previous prime is 1233539. The next prime is 1233563. The reversal of 1233540 is 453321.

1233540 = T₁₂₀ + T₁₂₁ + ... + T₂₀₈.

1233540 is a `hidden beast` number, since 123 + 3 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13816 + ... + 13904.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2^1233540 is an apocalyptic number.

1233540 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 1233540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358720).

1233540 is an abundant number, since it is smaller than the sum of its proper divisors (3483900).

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

1233540 is a wasteful number, since it uses less digits than its factorization.

1233540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1233540 is about 1110.6484592345. The cubic root of 1233540 is about 107.2468171908.

Adding to 1233540 its reverse (453321), we get a palindrome (1686861).

It can be divided in two parts, 123 and 3540, that added together give a palindrome (3663).

The spelling of 1233540 in words is "one million, two hundred thirty-three thousand, five hundred forty".