1158542140 has 24 divisors (see below), whose sum is σ = 2780501472. Its totient is φ = 397214400.

The previous prime is 1158542059. The next prime is 1158542149. The reversal of 1158542140 is 412458511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158542149) 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, 4137511 + ... + 4137790.

It is an arithmetic number, because the mean of its divisors is an integer number (115854228).

Almost surely, 2^1158542140 is an apocalyptic number.

1158542140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158542140 is an abundant number, since it is smaller than the sum of its proper divisors (1621959332).

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

1158542140 is a wasteful number, since it uses less digits than its factorization.

1158542140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275317 (or 8275315 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 1158542140 is about 34037.3638814759. The cubic root of 1158542140 is about 1050.2772178086.

The spelling of 1158542140 in words is "one billion, one hundred fifty-eight million, five hundred forty-two thousand, one hundred forty".