1154542120 has 32 divisors (see below), whose sum is σ = 2640310920. Its totient is φ = 454245120.

The previous prime is 1154542079. The next prime is 1154542121. The reversal of 1154542120 is 212454511.

It can be written as a sum of positive squares in 4 ways, for example, as 629307396 + 525234724 = 25086^2 + 22918^2 .

It is not an unprimeable number, because it can be changed into a prime (1154542121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234147 + ... + 239026.

Almost surely, 2^1154542120 is an apocalyptic number.

1154542120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154542120 is an abundant number, since it is smaller than the sum of its proper divisors (1485768800).

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

1154542120 is a wasteful number, since it uses less digits than its factorization.

1154542120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473245 (or 473241 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1154542120 is about 33978.5538244346. The cubic root of 1154542120 is about 1049.0670836775.

Adding to 1154542120 its reverse (212454511), we get a palindrome (1366996631).

The spelling of 1154542120 in words is "one billion, one hundred fifty-four million, five hundred forty-two thousand, one hundred twenty".