1101540 has 48 divisors (see below), whose sum is σ = 3366720. Its totient is φ = 266880.

The previous prime is 1101533. The next prime is 1101559. The reversal of 1101540 is 451011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 175 + ... + 1494.

It is an arithmetic number, because the mean of its divisors is an integer number (70140).

2^1101540 is an apocalyptic number.

1101540 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 1101540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1683360).

1101540 is an abundant number, since it is smaller than the sum of its proper divisors (2265180).

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

1101540 is a wasteful number, since it uses less digits than its factorization.

1101540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692 (or 1690 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1101540 is about 1049.5427575854. The cubic root of 1101540 is about 103.2761621544.

Adding to 1101540 its reverse (451011), we get a palindrome (1552551).

The spelling of 1101540 in words is "one million, one hundred one thousand, five hundred forty".