1154243140 has 12 divisors (see below), whose sum is σ = 2423910636. Its totient is φ = 461697248.

The previous prime is 1154243117. The next prime is 1154243147. The reversal of 1154243140 is 413424511.

It can be written as a sum of positive squares in 2 ways, for example, as 170668096 + 983575044 = 13064^2 + 31362^2 .

It is not an unprimeable number, because it can be changed into a prime (1154243147) 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, 28856059 + ... + 28856098.

It is an arithmetic number, because the mean of its divisors is an integer number (201992553).

Almost surely, 2^1154243140 is an apocalyptic number.

1154243140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154243140 is an abundant number, since it is smaller than the sum of its proper divisors (1269667496).

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

1154243140 is a wasteful number, since it uses less digits than its factorization.

1154243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57712166 (or 57712164 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1154243140 is about 33974.1539997687. The cubic root of 1154243140 is about 1048.9765204579.

Adding to 1154243140 its reverse (413424511), we get a palindrome (1567667651).

The spelling of 1154243140 in words is "one billion, one hundred fifty-four million, two hundred forty-three thousand, one hundred forty".