1154312120 has 32 divisors (see below), whose sum is σ = 2796988320. Its totient is φ = 426207360.

The previous prime is 1154312119. The next prime is 1154312123. The reversal of 1154312120 is 212134511.

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

It is a junction number, because it is equal to n+sod(n) for n = 1154312092 and 1154312101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154312123) 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, 1109396 + ... + 1110435.

It is an arithmetic number, because the mean of its divisors is an integer number (87405885).

Almost surely, 2^1154312120 is an apocalyptic number.

1154312120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154312120 is an abundant number, since it is smaller than the sum of its proper divisors (1642676200).

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

1154312120 is a wasteful number, since it uses less digits than its factorization.

1154312120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219855 (or 2219851 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1154312120 is about 33975.1691680851. The cubic root of 1154312120 is about 1048.9974163900.

Adding to 1154312120 its reverse (212134511), we get a palindrome (1366446631).

The spelling of 1154312120 in words is "one billion, one hundred fifty-four million, three hundred twelve thousand, one hundred twenty".