1154542140 has 96 divisors (see below), whose sum is σ = 3610474560. Its totient is φ = 306286848.

The previous prime is 1154542139. The next prime is 1154542153. The reversal of 1154542140 is 412454511.

1154542140 is a `hidden beast` number, since 115 + 4 + 542 + 1 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100954 + ... + 111806.

It is an arithmetic number, because the mean of its divisors is an integer number (37609110).

Almost surely, 2^1154542140 is an apocalyptic number.

1154542140 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 1154542140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1805237280).

1154542140 is an abundant number, since it is smaller than the sum of its proper divisors (2455932420).

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

1154542140 is a wasteful number, since it uses less digits than its factorization.

1154542140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068 (or 11060 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1154542140 is about 33978.5541187379. The cubic root of 1154542140 is about 1049.0670897352.

Adding to 1154542140 its reverse (412454511), we get a palindrome (1566996651).

The spelling of 1154542140 in words is "one billion, one hundred fifty-four million, five hundred forty-two thousand, one hundred forty".