115243540 has 12 divisors (see below), whose sum is σ = 242011476. Its totient is φ = 46097408.

The previous prime is 115243537. The next prime is 115243559. The reversal of 115243540 is 45342511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65512836 + 49730704 = 8094^2 + 7052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881069 + ... + 2881108.

It is an arithmetic number, because the mean of its divisors is an integer number (20167623).

Almost surely, 2^115243540 is an apocalyptic number.

115243540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115243540 is an abundant number, since it is smaller than the sum of its proper divisors (126767936).

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

115243540 is a wasteful number, since it uses less digits than its factorization.

115243540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762186 (or 5762184 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 115243540 is about 10735.1544003801. The cubic root of 115243540 is about 486.6374526364.

The spelling of 115243540 in words is "one hundred fifteen million, two hundred forty-three thousand, five hundred forty".