1101155240 has 16 divisors (see below), whose sum is σ = 2477599380. Its totient is φ = 440462080.

The previous prime is 1101155239. The next prime is 1101155249. The reversal of 1101155240 is 425511011.

It can be written as a sum of positive squares in 2 ways, for example, as 1064455876 + 36699364 = 32626^2 + 6058^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1101155249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13764401 + ... + 13764480.

Almost surely, 2^1101155240 is an apocalyptic number.

1101155240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101155240 is an abundant number, since it is smaller than the sum of its proper divisors (1376444140).

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

1101155240 is a wasteful number, since it uses less digits than its factorization.

1101155240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27528892 (or 27528888 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1101155240 is about 33183.6592316158. The cubic root of 1101155240 is about 1032.6413621386.

Adding to 1101155240 its reverse (425511011), we get a palindrome (1526666251).

The spelling of 1101155240 in words is "one billion, one hundred one million, one hundred fifty-five thousand, two hundred forty".